At E3, Sony demonstrated a way that 2 people can play a game on the same TV and look at 2 complete different images, without split screen.
When we saw it (watching a video at lunch at work), we all guessed how it could be done.
I found something that mentions how it's done: It works on any 3D TV; each person wears 3D glasses, one sees "left" the other sees "right" but they are two different 2D pictures.
Sounds like a cool use of existing technology! :)
