I think "Avatar" is kind of a unique category where people are enjoying the unique theatrical experience even though they may have seen it on the small screen. They want to have that immersive, transportive experience. "2001: A Space Odyssey" played for three years at the Loews cinema in Toronto. I remember that. It just kept playing. People wanted to return to that experience. That may not be the best example because I think "2001" took 25 years to break even.
James Cameron