orcishgamer: As an aside Wozniack thinks (unexpectedly to him) that the MS Surface is actually pretty great and he believes all laptop type devices will include a touch screen in a few years because it's simply that much better.
I think all PCs, even desktops, will probably do that in the future. Not necessarily because they really benefit from them, but just because people expect to be able to also touch the screen, if it is anywhere in their arm's reach (ie., maybe excluding big screen TVs... but never say never, I'm not sure if some of them have touch controls too, or then they use the Kinetic type controls instead).
I can see this already with my gf. She is so accustomed to the touch screen on the ASUS Transformer (which feels like a small laptop with a touchscreen and a keyboard) that she sometimes unconsciously touches the screen when she is using a laptop or even a desktop PC, and then saying to herself: "Oh right, no touch screen...", and reaching back to the mouse.
On laptops and desktops the touch screen controls are not very ergonomical because you'll constantly have to raise your whole arm, but it won't necessarily be the main UI in these "PC-like" devices, but used occasionally instead of the mouse, as an alternative. Like touching "Start a new game" instead of clicking it with a mouse, or moving a window around with your finger, instead of a mouse or touchpad.
But I still want to play my FPS games with a mouse!