WOW. I didn't think it was possible for the Leap motion sensor's capabilities to look more attractive than it did in their official video, which we posted on last month; but here's company CTO David Holz demonstrating the system to Cult of Mac, in real time, which is more compelling to see.
It's astonishing how fast and accurate the system seems to be, and how naturally you can alternate between one finger, both hands, and everything in between.
By the bye, a commenter on the original post opined that "holding your arms in air for hours while working at the computer doesn't sound real comfortable." I see that poster's point, but I'd choose to tire my arms out with a Leap over the current way of doing things. Standing/treadmill desks are increasing in popularity as we realize that sitting on our asses and sliding computer mice within a five-inch-square area is not good for us. Properly handled, it seems to me that a workday filled with Leap sessions could start to resemble Tai Chi, or a sign language conversation. As long as we can avoid the stress of fine repetitive motions, I'd rather we burn the calories.