Skinput
5th Mar 2010
In the future you could interact with a computer (like surf the web or withdraw money from a cash machine) by using your body as the input device.
As Chris Harrison's Skinput technology suggests, it may soon be possible to project a keypad or other input device onto a larger surface area, like your hand or arm, improving usability immensely; which would be particularly handy when it comes to working with very small devices.
Just think of the potential for improving web accessibility!
Via Core77.