I vote ‘no’ to flying cars. Mainly because the rolling variety are dangerous enough in the wrong hands without compounding it with flying. Flying buses are safer than rolling cars when highly trained professionals are piloting them. But the accidents can be horrific.
They will fly themselves using GPS, terrain mapping, and advanced communication with other self-flying cars. They are already gearing up to sell a variety of commercially available passenger drones.
We already have “auto-pilot” on many Teslas for example, though far from perfect it won’t be too much longer to get it much better. Road vehicles will communicate with other similarly designed cars (like “hey I need to exit in 2 miles” and other cars will accommodate in various ways to let them merge) which will make the roads more efficient, reduce congestion and eliminate road rage. Imagine no more seas of red brake lights! Cars can go faster and be a lot safer at the same time.
Another reason why we don’t need to spend $3.5 trillion on infrastructure. We can repair what needs patching and let technology make what we already paid for more efficient and longer-lasting.