Mobile is constrained to using touch interfaces Currently, but do you think this is the end game? Why not voice, gesture, eye tracking, or some as yet unachie

Mobile is constrained to using touch interfaces Currently, but do you think this is the end game? Why not voice, gesture, eye tracking, or some as yet unachievable brain interface? The seemingly insurmountable defects you point out (lack of feedback without activation, hand obscuring the screen) would seem to imply that touch is never going to be the best universal interface. My touchpad already has several useful gestures, draining away the marginal utility of other touch interfaces. I'm surprised that I haven't seen built-in touchpads that integrate a screen, maybe modal between the displayed screen in miniature, a zoom of the cursor, and a menu space. Might it make more sense to integrate a display into the existing touch interface rather than adding a new (hard to reach) one? On the other hand, I've been surprised that my friends who use tablet interfaces for graphics work don't find the integrated screen approach (http://www.wacom.com/en-us/products/pen-displays http://www.wacom.com/en-us/products/pen-displays) to be compelling.