A little off topic, but 3D will never be huge until you can get by without wearing the glasses.
It's too much of a pain in the ass for anyone with glasses and wearing the 3D glasses on top of glasses just sucks.
Movies are loving 3D right now not because it's cool, but mainly because you can't pirate 3D yet (or at least it isn't widespread if you can). It's an excuse to make people actually go to the theatres (and Avatar is very much worth the 3D, I even put in my contacts just for that).