Metro is heard for a long time, I just wonder why noone happen to sell LCDs/LEDs with touch built-in. This would be popular for even Win7 users. And from what I saw 5 years ago in ShenZhen the parts are not very expensive (like a few hundred CNY or something less than 80 USD for 15-inch display, and that supports single touch point though), why noone try to do that?
That's because single point touch doesn't work very well (and if it's a resistive touch you are thinking of, then it just plain sucks) unless you apply it to applications that were specifically written around its limitations. Most interesting gestures require multiple fingers and, without that, you don't get a good experience enough to compensate the lack of hovering and a lazy right click.