Not being funny, but if you have something like the kinect, why the hell do you need a touch screen.
The only reason touch screen is popular, is because gesturing is not easily implemented.
Touch screens are terrible if you're trying to look at something, as you are always obscuring your vision with your hand, and if you're not meant too look, buttons are more responsive, cheaper, durable and feelable.
What they should be working on is a headset screen combined with the kinect, so you can turn around in a game (unless ofc you have a screen encircling you), not pissing around with 'old' technology.