[egypturnash]

I don't think it's one or the other. Has the mouse replaced the keyboard? It's an additional way to interact.

Hell, I could have used it a little earlier today - I was bleaching my hair and realized my machine wasn't playing any music. Currently my options for remedying this are (1) poking at the media keys on my keyboard (and getting bleach all over them), or (2) picking up my Wacom stylus, going to the Dock to bring up iTunes, and hitting its play button, thus smearing bleach EVERYWHERE. With one of these sitting on my desk and wired into some global hotkeys, I'd have had the additional option of waving my hand in a particular way.

I'm also thinking I totally want to incorporate one of these into the media PC I'm working on based on a Raspberry Pi, a pico projector, and half of a rubber cat[1]. Slouch on the couch, wave my hands in precise gestures to control it instead of having to bring up a mouse somehow.

Using it for long, sustained periods? Nah. Using it now and they? Oh yeah.

[1] the whole thing is disguised as Nyan Cat, with the projector poking out of its snarling mouth and the plaque it's mounted on painted like a Pop-tart.