> They will never sell a car with similar functionality to that demo to anyone

They're explicitly advertising selling exactly that car. They just say it's by "invitation only". Do you think it's just a marketing gimmick? I dunno who's crazy enough to buy one. But for the right price, they could definitely sell a few.

I could maybe see a major movie studio buying one or two, but I think the major problem with the stunt functionality is not so much making the vehicle, its finding a building/structure where it is safe to hang a multi-ton vehicle off the wall or the ceiling.