I can understand B’s concern, but even if “touch” means poking with a stylus on the go, there’s still no real integrated UI, no innovation beyond launching applications with Origami (well, okay, listening to music).

It’s frustrating to see so little innovation in ordinary functions, when they’ve done such a magnificent job of handwriting recognition which, with voice recognition, should be the hardest part.

Maybe the MID revolution, like smart phones or something, will push things in that direction.

I’d say the number one obstacle against more touch applications is smudging. Personally I can’t stand any sort of smudge or mark on my devices. Touching screens with your fingers is bound to leave a smudge, and touchscreen computing won’t be taken seriously until they develop a smudgeless screen.