Anyone who wants to see Avatar (or any western movie) in China can just plunk down the 9-10 yuan (<$1.50) for a (probably pretty decent) bootleg DVD that can be found in just about any marketplace. I'm sure this is mostly for posturing and perhaps economic reasons. I'm sure they sometimes do these things just to remind people that they're there and that they can, even if the people there aren't overly impressed or bothered by it.

My inlaws in China probably watch more American movies than I do and I have netflix.