Leap is a motion controller for your computer, using technology reminiscent of Xbox Kinect. According to its manufactures; “It’s more accurate than a mouse, as reliable as a keyboard and more sensitive than a touchscreen… the Leap can distinguish your individual fingers and track your movements down to a 1/100th of a millimeter. This is like day one of the mouse. Except, no one needs an instruction manual for their hands.”
I’d question how intuitive this is actually going to be, but if this video is to be believed then this is a serious jump forward in touchless interaction.