Please correct me if I'm wrong (I probably am), but using this for anything but a cool demo feels dangerous to me: You're relying on the input signal of an emergency motion detector to park the harddrive heads as a device to do UI interaction.

What I mean is: In order to switch spaces, you have to hit the machine hard enough for the "uh oh - shock emergency" sensor to actually trigger. That means that you have to hit the machine hard enough for it to think it has to do something in order to prevent hardware damage.

What was meant as an emergency measure for rare emergencies now becomes commonplace. Are you sure that a) the mechanism always works? and b) that the emergency head parking doesn't put too much stress on the disk to wear it down more quickly?

I'm basing this question on the fact that in the demo video there was one instance where they didn't hit the device hard enough for the switch of spaces to actually happen. That leads me to believe that the sensor isn't that accurate and really only measures dangerous levels of activity.

But yeah: As a demo performed once or twice it's really cool and fun to watch.