Wouldn't it be awesome? Imagine a MMORPG, Where you put on this headset, and you completely control your character, form the first person view. The headset would read your brainwaves, so whatever you thought about you would do. You would have to swing your sword, jump, run away, shoot arrows, use magic, etc. But you wouldn't get tired, cuz its just brainwaves.

Or you could use the same idea in a FPS game. Take Left4Dead. Put yourself in the game, you have to run from zombies, pick up ammo, re-load your guns, find new weapons, or punch zombies in the face if you want to. You would have to make your own barricades, wrap up your wounds, and everything.

Oh, and the graphics would be mind-blowingly realistic. Complete immersion into a beautiful fantasy realm, or the gritty streets of some urban wartime era. Jump on some monsters back, and impale him with your sword while your buddy casts fireballs that scorchs its face off. ohhhhhhh it would be so fucking awesome.