Flying vehicles are inherently more expensive than ground vehicles, so I doubt this will take off. And these things had better be completely autonomous or else you'll have to watch for bad drivers coming at you in three dimensions instead of two!
Yeah, the commercial usage of drones are just evolving up after a lot of R&D and a scrutinising from the regulatory bodies. Even in the case of drones, it's the products that would be damaged if anything goes bad. But in the case of flying cars, it would really be a nightmare and the cost would sky rocket for sure!