Hard to believe that before Apple made multitouch cool, the most we ever "touched" our PC was touch typing. Now, here's photoelastic touch, a more tactile form of interaction that enters into the Minority Report realm (still one of the coolest future tech shows) by not even touching the screen. Japanese researchers used a face mask comprising see-through gel as a haptic interface, allowing the user to press, pinch or touch the transparent mold to control the computer. In this case, the actions would prompt a furrowed eye brow or eye movement.
Of course, there's nothing like watching all this in action. So catch the video coming right after.