By waving your hands and making gestures in the air in front of the monitor you can control it.The leap is able to track all ten of your fingers and track their individual movements down to a 1/100th of a millimeter. You can also stack up several devices to create a larger input area. See more for VIDEO presentation.
There are no details how this all works, but it’s impressive, isn’t it? You can pre-order yours right now (if you are lucky) and the first units will ship this winter, made by a company called Leap Motion.
But I'm sure I have seen this before in some movies, so it is not so new technology yes?