Our current generation of digital projectors can currently run up to 144 frames per second, and they are still being improved. So right now, today, we could be shooting 2-D movies at 48 frames and running them at that speed. This alone would make 2-D movies look astonishingly clear and sharp, at very little extra cost, with equipment that's already installed or being installed. I've run tests on 48 frame per second stereo and it is stunning. The cameras can do it, the projectors can (with a small modification) do it.
So why aren't we doing it, as an industry? Because people have been asking the wrong question for years. They have been so focused on resolution, and counting pixels and lines, that they have forgotten about frame rate. A 2K image at 48 frames per second looks as sharp as a 4K image at 24 frames per second ... with one fundamental difference: the 4K/24 image will judder miserably during a panning shot, and the 2K/48 won't.
If every single digital theater was perceived by the audience as being equivalent to Imax or Showscan in image quality, which is readily achievable with off-the-shelf technology now, running at higher frame rates, then isn't that the same kind of marketing hook as 3-D itself? Something you can't get at home. An aspect of the film that you can't pirate.
Of course, the ideal format is 3-D/2K/48 fps projection. I'd love to have done 'Avatar' at 48 frames. But I have to fight these battles one at a time. I'm just happy people are waking up to 3-D.
Maybe on "Avatar 2."