I had thought for a long time that it'd be nice to have a one-handed analog stick controller for my left hand, covered in buttons on the back, coupled with a mouse. It would actually give me finer control over movement than a keyboard, but with the aiming capability of a mouse.
This device isn't exactly that, but I'm really interested in this device to see how it helps with my RSI when gaming. I'm also curious as to how the haptic feedback will work. Maybe I should sign up for that beta after all!