ISTM the many screen-on-wrist testimonials on this page confirm a longstanding prediction of mine: the "smartphone" is not the ultimate device form that our children will be using as adults. Instead, every personal item will become part of a personal constellation of devices. Phones will gradually disappear as better (i.e. ubiquitous, low-power, and basically free) wireless networks emerge, and our eyeglasses will talk to our hats which will talk to our shoes which will talk to our wrist devices...