One of the reasons I prefer consoles over handhelds is so I don't have to stare down at a little screen. I get neck cramps. (Or arm cramps, if I try to hold it up to my face.) The links above don't talk about it being a separate screen and an integrated part of the controls like you're saying; they talk about streaming the whole game to the little screen. IMO what you're suggesting wouldn't work very well either. The DS works because the screens are right next to each other. I don't want to be looking up at the TV, then down at the controller, then back to the TV, etc.