Hollywood didn't run out of movies, it's ran out of money. When a movie (or any IP) flops bad, producers instinctually run from anything that looks like it. They are risk adverse, and new things, such as Mr. Cameron's half-billion dollar proof-of-concept, tend to make them squeemish (which is also why Avatar also stuck with such a tried-and-true plotline that has been in use for as long as cinema itself).
EDIT: Also, thread-necroing is bad...