Writing on the wall...

Researchers from microsoft and the Carnegie mellon University presented a prototype called the Omnitouch. This device, mounted on the shoulder of the user, allows the user to display a keypad on any surface in front of him or her. So tables, walls and even ga hand can be used for interaction both typing and swiping. They still have to make it smaller but it looks promising to deliver easy to use and versatile keypads. As demonstrated in youtube movies it even supports multi-touch.