Hey i found your post really interesting!!! I was looking for something exactly like that. I have another configuration in my mind that can be awesome too and at the same time a little bit cheaper. All we'd need is some 3d glasses like the ones you put (the cybermind ones look cool), and some head-tracking system. This way, while having your hands on your gamepad, or keyboard or whatever you use to play, the head-traking system will tell the computer the inclination and tilt of your head, and therefore it will display on the googles the corresponding image.

Lets say you're playing Mirror's Edge. You can move your head and check everything on sight, but you control Faith's body with your pad and so the orientation. If all that is combined with truely 3D experience, ..... i'm melting for just imagining it...

Take care man,

Señor Rosa