4K is, essentially, an ultra-high-definition screen resolution. Also called UHD or 4K UHD, the display technology has become the default screen resolution across all of the TVs that you’re likely to see in stores today – as well as many PC monitors, too.
The very best UHD TVs pack over eight million pixels in their high-res displays – that’s four times the amount you’ll find on the Full HD panels in today's small TVs.
You don’t necessarily need access to 4K entertainment content to enjoy the benefits of 4K resolution, either, since many of the best 4K TVs – i.e. most of the 65-inch displays on this list – boast impressive upscaling technologies that bolster content filmed in HD.
The only displays which sport a sharper picture are the 8K variety – though, being a still-new technology, choice in that department is much more limited and, naturally, 8K models are far more expensive.
4K resolution is increasingly common for new releases on the best streaming services, and obviously is needed to take advantage of the best 4K Blu-ray players. The PS5 and Xbox Series X consoles are also both built around 4K, so we focus on having 4K TVs in our list of the best gaming TVs.