Article aside, I don't really understand how this is a cool (or even necessary) device... I watched the videos on their Kickstarter page, and correct me if I'm

Article aside, I don't really understand how this is a cool (or even necessary) device... I watched the videos on their Kickstarter page, and correct me if I'm wrong, but it has three functions that I don't need: 1) The outside rotation for adjustments; Mouse wheel? 2) Basic swipe gesture recognition; Um, any button, and I don't have to be hands off the keyboard? 3) Touch tracking; Trackpad...?