He's done some good stuff. This hand-waving business? Pretty much just hand waving, as far as I'm concerned. 3-D design will never be the domain of a "layman" or "idea guy," regardless of the interface. I don't see that this will allow for a major increase in the speed that competent designers can achieve in designing parts - there are already numerous interface tools (joysticks, spaceballs, etc) that already allow the designer to interact with 3D models rapidly and intuitively.
And don't get me started on hyperloop...