I've seen 3 movies in 3D. With Avatar and How To Train Your Dragon, I felt the 3D added something worthwhile to the experience. With Alice In Wonderland, it didn't.

I don't think I'd want a 3D TV though, not while you need special glasses to see the picture properly. It's one thing wearing them when you've made the effort to go to the cinema, quite another when you're just casually watching at home; they become something else to lose, like the remote only not as useful.