Why are you all posting when the topic asks you to just imagine?
Personally, I feel very constricted by 3d games, especially when they use the over-the-shoulder camera view. It's a poor representation of the human field of vision, and it often pulls me out of the experience when I stop and think "that never would have happened / I never would have missed seeing that if I were actually there and could just turn my head instead of being forced to rely on some narrow-angle camera to swing around."
I admire Nintendo's ambition with the Wii, but I think a little innovation in the area of perspective control would pay off a lot more than their innovation in gameplay control. It doesn't matter to me if I'm pressing something with my thumb or swinging my whole arm, if I still have to fumble with camera controls or deal with my character's apparent inability to just turn around goddamn it you're being attacked from behind, I'm going to get irrated and characterize it as poor gameplay.
I know they've tried virtual reality (sort of) and failed gloriously, but isn't it about time they try again? Give me a gyroscoped helmet that lets me actually look around, and not only will I start playing video games again, I'll start playing genres I've never liked (like war simulations) just for the experience.