I wouldn't exactly call it a demo.. more of a marketing stunt, albeit a very impressive one from an engineering POV.
I wonder what the point of this was? Seems likely related to anticipated purchase of Tesla by SpaceX. Maybe meant to (irrationally) justify a high offer price for Tesla?
Can't say I'm a fan of the styling of the car - I guess it'd look at home parked beside a Cybertruck, but something like the Porsche Mission S is way sexier.