In a nutshell, he shows a gesture-operated wireframe or shaded model viewer. All that was shown was zoom, rotation and moving the clipping plane. It must be impressive for the non-CAD crowd, but I didn't see anything new that was practical, and there are far better viewers already available.
Elon Musk tweeted "Will post video next week of designing a rocket part with hand gestures & then immediately printing it in titanium". But the video says he designed the parts in Unigraphics, so it was NOT designed using hand gestures - unless you count using a mouse as "hand gestures".
Anyone that has used a solids modeling CAD application with a Space Controller in the last 17 years has been able to do pretty much all of this and more (not counting the use of Ti in the printer). But Space Controller + mouse users keep their arms on the desk, rather than waving their arms in the air (fatiguing). So thanks for thinking of us, be we designers do NOT want to hold our hands in the air. We had enough of that crap with light pens.
In all fairness, the one nice thing the video suggests is the gesture-operated viewer might make sense for a standing presenter. The Space Controller requires a flat surface to rest upon, so gesture-operation might make sense for this application.