I think it will sell pretty fast at first and then people will realize there is nothing you can use it for. School kids will buy it instead of a laptop and then fumble around with the touch keyboard cursing under their breath. Disgruntled kindle buyers will purchase it and realize the screen sucks for reading.

IMO it is a romantic idea brought forth by the likes of mid century scifi writers but in reality a slate type computer interface is not the most efficient way for us to input. I feel that to be able to type efficiently I need to be able to use tactile feelings to keep me on track.