Disney Research has created a new sensing system called Touché that can sense a wide variety of human hand and body interactions. It doesn't stop just at that, but in all sorts of objects including liquids.
That's fascinating! Most capacitive sensing only operates on one frequency, but Touché sweeps over a range of frequencies and uses it to suck down more data about how an object is being touched. It will be able to tell you what kind of actions your body is taking,