Mircosoft Reasearch UK and SideSight
Alex Butler, Shahram Izadi, and Steve Hodges, all with Microsoft Research UK have been prototyping gestural interactions outside the device itself. This will take some work to get it right and get it right in the proper contexts, but a creative approach for ever-shrinking devices.
By twisting one’s hands appropriately on either side of the phone, objects could be rotated in place. Pages could be panned and scrolled by moving a hand up and down, and Microsoft also proved that text could be entered and edited on the main screen through a stylus while the other hand scrolled the page — a movement that would be akin to the motions a user’s hands would make if he or she were writing on a sheet of paper.
A quick motion toward the device could also be interpreted as a “click,” according to Microsoft.
http://www.gearlog.com/2008/10/microsofts_sidesight_something.php
