"IMAGINE movies and computer games in which you get to smell, taste and perhaps even feel things."
So you're running around in a game and suddenly you get shot in the head... hmm... I realy want to feel that... Or perhaps you are running around amidst dead, decaying bodies, and you get that stagnant smell of festering flesh... Yummy. Perhaps it could be good for some games, but deafinetly not for an FPS.