The phone shown is called the Oynx from Pilotfish and Synaptics. It has no buttons and is controlled entirely by signs and gestures. The idea is cool in theory, but I can imagine many circumstances in which it’d be difficult to manage. It is, however, capable of recognizing specific body parts (yea, yea), so it can be trained to answer a call when you raise the phone to your head.
Cell Phones of the Future! – CrunchGear

A Quantum Leap for Cell Phones