> It's worth pondering how significantly new I/O devices change the game -- the first tty, the commercial keyboard & mouse, the touch screen, multi-touch trackp

> It's worth pondering how significantly new I/O devices change the game -- the first tty, the commercial keyboard & mouse, the touch screen, multi-touch trackpads, and voice activated smartphones. This comment actually explains my complete disinterest in Glass :) I don't see how voice-activated smartphones have changed the game yet, IMHO they're in the same league as Glass - "this might be worth it later" (especially dubious for Siri). I use two touch-screens and a trackpad every day and yet I could probably go back to only a keyboard and die happy. What has changed my life was connectedness, and Glass does not do more than a smartphone in that area.