I saw this in an early stage - it looks as thought they have made great strides. Either that or they employed a great marketing company.
I'll add this as a peripheral device when the price is reasonable. It might replace the wireless mouse if it gives me enough control. I see myself reaching for my cup of coffee and closing, but not saving, work I spent hours on. The sensor - well, you have to position your movements over it. Not so much different from reaching for the mouse or using the touchpad.
Anyway, I'm sure this will be "the next big thing" in HID. Anyone else see ground-floor opportunity here?