Cars won’t evolve into shuttle crafts. Who needs a shuttle craft to go to the grocery store? And really, the design of a new generation of supersonic passenger craft is still only good for flights of 2,000 miles or more, and really only for flights of more than 5,000 miles or more.
Flying cars make some sense, but given traffic densities in urban situations in the present day world, the first step is to get self driving cars working in two dimensions.