To be fair, many people in their 20s see email as you see faxes and memos, obsolete and clunky. They communicate in texts, instant messages, Facebook and Twitter.

Missing the point. The point is to reconfigure the screen on the fly. Imagine if your touch phone could pop up a physical 10 digit numerical keypad when in call mode, then a 30 button qwerty keyboard when in text/email mode, then play/pause/stop/next track buttons when in music mode, etc. One screen, many possible interfaces depending on application, but with tactile feedback.