Skinput sends skin crawling

Resistive touchscreens are currently losing ground to capacitive screens, but the folks at the Carnegie Mellon University and Microsoft are collaborating on a new touchscreen which will see action on your body, known as Skinput. What makes this different is its ability to recognize what body part you have tapped, and based on the sound which was generated on either skin, muscle or bone. You will need to strap on an armband containing piezoelectric cantilevers, which are sensors that measure pressure, acceleration and force, while a pico projector that is the same as those found in handsets to beam the user interface on your skin. Looks like a great way to get all touchy feely with a lady of your choice, eh, through the Skinput interface?