Like The Wiz , Peter Jackson's The Lord of the Rings is going to recast Tolkien's world in a virtually unrecognizable mold for the purists. It's not going to be Tolkien's vision of Middle-earth. It cannot possibly be Tolkien's vision of Middle-earth. Sadly, he is no longer here for us to consult. No, they don't have hundreds of millions of dollars to spend on sets, costuming, and CGI, but we still attend the plays and enjoy them.
People love bringing Tolkien to life, and they do it every day on the Web, on stage, in books.
We get over the inaccuracies. We forgive the mistakes. We excuse the deviations from what Tolkien said. There are a million visualizations of Tolkien's world already, and none of them come close to what Tolkien described. The Internet preview is not just a sneak peak.