People don't care much for cars driving into their houses, and they care less about flying cars crashing into their roof tops. Anyone who had the wherewithall can own and fly a Robinson helicopter, from roof-top to the golf course, but learning how to fly a helicopter is more difficult than learning how to drive a car. It's easier to just order a pizza, delivered by automated drone. There are still multi-car pile-ups on the highway. Let's keep them there.
BTW, the Moller Sky-Car Company is still waiting for your investment, as it has for decades. I, myself, gave it a pass.