There is an additional limitation I noticed with 3D movies. You are stuck with the focus of the camera used, you can't bring distant objects into focus because they are out of focus on the film.

That is something that directors will have to learn to work with when filming 3D. It's especially when video games use focal blur and motion blur. Trying to focus on a distant (or really close) object causes a headache because it never comes into focus, and the interactive nature of games increases the expectation that I should be able to look where I want to look, unlike movies.