If you're an interface designer (I am), you should pre-order this thing. This will be a standard form of interaction in a couple of years and you should jump on it early and start figuring out the kinks. Too cool.
It really won't. Have you any idea how tiring waving your arms around like that would be all day? There are so many use cases where it doesn't even work that would require a complete rethink of how anything is presented on in internet. For example how about the HN comments where it's pasted as code and it scrolls horizontally. Target that and scroll it with that system. As soon as you have a single use case where a m…
They do claim sub-mm accuracy; maybe applications in the small are realistic.
So instead of arm-waving, think of rotating your hand just above the touchpad to rotate and object in 3d space, but briefly. And the touchpad would still work like a regular touchpad, but maybe you don't even need to touch it.
Sub-mm accuracy seems to imply that really subtle gestures could work.