Meant to be Seen

https://www.youtube.com/watch?v=sAcTshfZCU8

The leap has some serious competition in Intel's new Perceptual Computing Camera. Full Skeletal Hand Tracking from every angle. Intel asked Stan Melax (the creator) to take down the video because they didn't want the competition getting ahold of it, but he recently re uploaded them.

The tracking method is detailed here: http://dl.acm.org/citation.cfm?id=2448232

EDIT: Now a german company named "Gestigon" has joined the fray:
http://www.youtube.com/watch?v=NW_vSDdPg-M
It sells a middleware that takes the point-cloud data that the Intel Camera and the Camboard Pico output, and it uses that to reconstruct gestures and hand skeletons.

I wouldn't call it perfect, the hand looks like its made of rubber while its trying to grab the bar off the ground.

That might be because the hand is also physics enabled, still pretty cool stuff.

albeit using significant computing resources.

Lets hope the Kinect 2 with its IR camera, and other nifty methods can make for a computational cheaper way to process this.

Added a new video to OP.

Since the Kinect 2 works via the same method as the Camboard Pico and the Intel Camera (and the ZCam if anyone remembers that), it very well should be capable of taking advantage of Gestigon's software as well (if you're close enough).

This actually looks pretty nice. I wouldn't call this perfect, but still good.