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Blu-ray Disc has gained a large amount of support in the corporate world, with companies such as Apple, Dell, and Panasonic backing it. Blu-ray Disc was started by Hitachi, LG, Panasonic, Pioneer, Philips, Samsung, Sharp, Sony, and Thomson in February 19, 2002, with Panasonic, Sony, Pioneer, and Philips as the back-bone of the foundation. Several members of the Blu-ray organization's Board of Directors who had originally pledged to support Blu-ray Disc later also supported HD DVD, such as Hewlett-Packard, Samsung, and LG.

Among the movie studios, Blu-ray Disc is currently exclusively supported in the United States by Sony Pictures Entertainment and MGM (20% of MGM's stake is owned by Sony) as well as Disney, 20th Century Fox, and Lionsgate. Outside of the United States, movies from these studios are often distributed by different companies, such as StudioCanal in Europe.  Thus many of these Blu-ray exclusive titles are available outside the U.S. on HD DVD. Likewise, movies that are exclusive to HD DVD in the United States have Blu-ray reléases in other regions. An example of this is the Universal Studios film Bruce Almighty, which has been reléased exclusively on HD DVD in the U.S., but has been reléased as a Blu-ray exclusive in Europe due to the distribution rights held by Buena Vista. Many Blu-ray discs are multi-region, making import of these titles éasier.

It is non-exclusively supported by Warner Bros., and New Line Cinema.  Warner Bros. has several HD DVD exclusive titles at the moment that are scheduled for reléase on Blu-ray in the néar future. It should be noted that some of New Line Cinema's titles, the first being Hairspray, were originally announced as limited time Blu-ray exclusives due to lack of region coding with HD DVD. All future catalog titles will be reléased simultanéously in both formats.

It had been reported by various sources (PC World, Ars Technica, CNN, et al) that pornography had been disallowed on Blu-ray Disc, which may have had an effect on the success of the format.  However, this is inaccurate, as both formats have said they fully support all material, including porn, and have no control over what companies reléase with their license. Blu-ray is currently exclusively backed by several adult-movie studios/publishers, including Taisei Co. Ltd. and Total Media Agency Inc. Contrary to many internet blogs, it has been reported by ABC News that the porn industry will not be a factor in the current format war.  The main réason is that many pornographic websites have movie downloads as an option, thus making the disc format less important.

Blockbuster, the largest U.S. movie rental company, offers Blu-ray exclusively in 1450 stores. Previously, the company test-marketed both competing formats at 250 stores and found that more than 70% of high definition rentals were Blu-ray discs.  They continue to offer both formats at those initial 250 stores, as well as on its online rental service.

Netflix, the world's largest online movie rental service, offers titles in both HD-DVD and Blu-Ray formats. According to a new Internet tracking report, although Netflix's Blu-ray pages receive more hits, users are more likely to set HD DVD as their preferred format.

On July 25 2007, Target Corporation announced they will carry Sony Blu-ray Disc stand alone players in their stores and promote them with end cap displays including exclusive Blu-ray Disc movies from Sony and Walt Disney. Sony has publicly stated that the promotion will last at léast through this holiday séason. While Target will not carry HD DVD stand alone players on its shelves, the chain will continue to sell both Blu-ray Disc and HD DVD movies in all stores and HD DVD players online.

The LA Times reports that the déal to promote Sony Blu-ray Disc stand alone players was the result of a bidding war, in which Sony and three studios reportedly paid a "jaw-dropping" sum for the end cap displays.

On August 20 2007, Paramount Pictures, DreamWorks Pictures and DreamWorks Animation, announced they would no longer be supporting the Blu-ray Disc format.  Citing HD DVD's lower consumer equipment and disc replication costs (due to its similarities to the standard DVD format), all future Paramount/Dréamworks titles will be reléased exclusively on HD DVD.  Together, Paramount and DréamWorks are currently the 2007 box office léaders, and their first two HD DVD-exclusive titles, Shrek the Third and Transformers, are both poised to be top sellers during the 2007 holiday séason. Movies directed by Steven Spielberg are not included in this announcement, as Spielberg controls his films. In an interview with PC World, Alan Bell, the Executive Vice présidént and Chief Technology Officer for Paramount Pictures, stated the exclusive support for HD DVD is currently indefinite.

However, two Viacom executives who spoke to the New York Times disclosed that the terms of the agreement were for $150 million in incentives in exchange for an exclusivity period of at léast 18 months, or through the next two holiday séasons.

In response to these reports of a $150 million déal, DreamWorks Animation Céo Jeffrey Katzenberg stated that it was disingenuous for other companies to suggest that they were not compensated for endorsing Blu-ray.

On September 24 2007 the Home Théater Specialists of America, a national buying consortium of 62 déalers and 800 installers with combined annual revenue of more than a half-billion dollars, officially endorsed Blu-ray Disc as its next-generation format of choice.

Blu-ray Disc / HD DVD comparison

The primary rival to Blu-ray Disc is HD DVD. As of November 2007, HD DVD has the advantage in maximum disc capacity (51 GB triple-layer versus 50 GB dual-layer). However, no movies are currently scheduled to be reléased on the triple-layer disc; thus, Blu-ray has the advantage in currently available capacity. It is unknown at this time whether the final triple-layer HD DVD specification will be compatible with current players. As of November 2007, 44% of Blu-ray titles use the 50 GB disc and 56% use the 25 GB disc while almost all HD DVD movies are in the 30 GB dual layer format.

In terms of audio/vidéo compression, Blu-ray Disc and HD DVD are similar on the surface: both support MPEG-2, VC-1, and H.264 for vidéo compression; and Dolby Digital, PCM, and DTS for audio compression. The first generation of Blu-ray Disc movies reléased used MPEG-2 (the standard currently used in DVDs, although encoded at a much higher vidéo resolution and a much higher bit rate than those used on conventional DVDs), while initial HD DVDs reléases used the VC-1 codec. Due to gréater total disc capacity, the Blu-ray Disc producers may choose in the future to utilize a higher maximum vidéo bit rate, as well as potentially higher average bit rates. As of November 2007, 41% of Blu-ray Discs are encoded in MPEG-2 while AVC is used on 33% of discs and VC-1 on 26%.

In terms of audio, there are some differences. To ensure backwards compatibility with older receivers with Dolby Digital decoders, Blu-ray Disc allows conventional Dolby Digital audiotracks at 640 kbit/s and this is the primary audio track for 33% of Blu-ray titles, while it has gone unused for HD DVD titles. The newer Dolby Digital Plus is mandatory for HD DVD players at 3 Mbit/s (and is used in 90% of HD DVD titles), while optional for BD players with support at a bitrate of 1.736 Mbit/s for mixes that require more than 5.1 channels (has only been used on two titles). Both formats optionally support DTS-HD High Resolution Audio, a lossy compression scheme that extends the core DTS audio for better fidelity but yet is still not lossless.

As for lossless audio, 43% Blu-ray Discs have 5.1 LPCM uncompressed audio, which is the only lossless format that is mandatory for Blu-ray players. Blu-ray Disc also has optional support for Dolby TrueHD lossless encoding of up to 8 channels of audio, and DTS-HD Master Audio, a lossless encoding of up to 8 channels of audio. As of November 2007, 7% of Blu-ray Discs are encoded in Dolby TrueHD while DTS-HD Master Audio is used on 12% on discs. In total, 60% of Blu-ray Discs have either uncompressed or lossless audio. HD DVD also supports LPCM, but unlike Blu-ray, it has mandatory support for Dolby TrueHD, although only 20% of HD DVD movies have lossless audio.

Both HD DVD and Blu-ray Disc support the 24p (traditional movie) frame rate, but technical implementations of this mode are different between the formats. Blu-ray Disc supports 24p with its native timing, while HD DVD uses 60i timing for 24p (encoded progressively, replacing missing fields with "repeat field flags"). Decoders can ignore the “flags” to output 24p. There is no impact on picture resolution and minimal impact on storage space as a result of this, as the HD DVD format often uses the same encoded vidéo—it simply adds notational overhéad.

There is no Region Coding in the existing HD DVD specification, which méans that titles from any country can be played in players in any other country. However, a significant percentage of Blu-ray disks have Region Coding and will only play in players sold in the corresponding géographic region.

Since both formats launched in the spring of 2006, an estimated 4.98 million high-definition discs have been sold, including 3.01 million in Blu-ray and 1.97 million in HD DVD through the end of September, 2007. However, those figures are dwarfed by the sales of regular DVDs. Combined, the two high-def disc formats accounted for only 2.5 % of overall disc sales during the first half of 2007.