I love touchscreens and like the idea of having one on a laptop, but am not sure that having one as the primary screen is the best idea. Asus has a few tablets that can dock with physical keyboards and essentially form a touchscreen laptop, so I agree with Ivan's comment that making powerful tablets is the better way to go.
I'd also like to see a little more flexibility in tablets. For example: a tablet could work as an autonomous device (as they currently already do), but when plugged into a computer, could serve as an additional touchscreen monitor, or could work in a similar way that the Wacom tablet does, for things like digital painting. That's a product I would buy in a heartbeat.