For the most part I'll try to reserve judgment until I actually try it, but what I'm really baffled by is the touch screen. What's the purpose of having a screen on the controller if the contents of that screen are overlayed onto the game when you touch it? And what's the point of it being a touch screen? There are already touch inputs on the controler that could be used to navigate whatever is available on the screen, just have a button to switch input between that and the game.
No announcement yet.
Valve Announces Its Open Steam GamePad / Controller