The direction Nintendo's trying to go in here worries me, to be honest. The controllers will be expensive as heck, and they're trying to move into a market that's already well-occupied while risking losing their current market, especially what with the price this will have. The idea may appeal to "intense gamers", but it'll take more than "just as good" to get the mass market to buy one.
Personally, I'm burned out on everything that has to do with touch screens. For instance, why does the Vita feel the need to have something as useless as a
touch screen on the back?
Also, responding to a particular point:
Appeals to casual players: Nintendo demonstrated a Wii Sports game where you would set the controller on the floor, and the screen would display the lie of the golf ball, and you'd hit the ball using the Wii remote. There's still the casual appeal of the Wii, enhanced by new features.
To me, that sounds like more of a pain in the butt, to be honest. I doubt the casual market would consider this kind of complexity to be fun. The fun of Wii Sports was in its straightforwardness and its party appeal, and this kind of thing sounds like it goes against that.