60hz may indeed be enough, but in general, touch-friendly UI needs tight bounds on latency to user input (which may be a problem with a mere 30hz). Every "drag

60hz may indeed be enough, but in general, touch-friendly UI needs tight bounds on latency to user input (which may be a problem with a mere 30hz). Every "drag"- or "swipe"-like interaction on a touch UI is basically the UX equivalent to moving a mouse pointer - something that has used a hardware-accelerated sprite since forever, precisely in order to put a tight bound on max latency!