At this year's D: All Things Digital Conference I asked Tim Cook what he thought of wearable computing. He said "there are some cool things that can be done" but noted the real question was whether "it can change somebody's behavior." Google's Project Glass will do just that. This wearable heads-up display could literally re-define mobile computing, putting the power of a smartphone in your face with a sleek and wearable design.Plus, because Project Glass has a built-in camera, you'll be able to live-stream Junior's first steps. Google will make a developer kit called Explorer Edition available early next year for $1,500, and a lower- cost consumer model should follow in 2014.