I don't know about platforms, but I think a shift in UI must come. The thing is that touchscreen mobile phones are terribly clunky interfaces. It's much harde

I don't know about platforms, but I think a shift in UI must come. The thing is that touchscreen mobile phones are terribly clunky interfaces. It's much harder to express you intent with fat human fingers than with keyboard-and-mouse device. The advantage of the phone is entirely in its mobility, and the fact that you want a telephone anyway. If some interface (augmented reality, voice, direct neural probes) becomes a workable UI that is both expressive and mobile, then it will take over.