I'd say: IP (Intellectual Property) develop a bunch of clever concepts enough to patent them. Bits and pieces of this may have value in licensing arraignments in the future.
As far as their concept goes, it's a new twist on the old flying car. I've seen flying car schemes since I was a kid, and they existed before that. Realistically, toys for the super-rich at best, until one falls from the sky, and then it will be the lawsuits flying.