100% right. If this is a car then a Cessna 172 is also a car.
Just because it has wheels and can taxi around doesn't make it a car. They'll need something to remove or stowe the wings before it can be used on public roads. That will make it a lot heavier, eating into any useful load the aircraft may have. It's a long way from prototype to product.
Instead of having hip music in the demo movie, I'd like to hear what noise level this contraption produces.