Flying cars will never really be a thing
While it's already technologically possible, what you get is a car that's not a great car and not a great aircraft. Given that the average person has enough trouble with current cars, putting them into a situation where turning circles and braking distances can be measured in miles rather than meters* would put the incident and casualty rates past acceptable.
You may get a personal flying transport, it's unlikely, you absolutely won't have manual control of it. The safety requirements will overrule all other considerations.
Everyone having a car may no longer be a thing anyway
The centralised nature of our cities and civilisation requires a lot of transportation of people. Already the internet and related technologies has significantly reduced the practical requirement for many people to attend a place of work. The primary reason to be physically present now has more to do with culture than the nature of the work. Expect a reduced requirement to physically attend a place of work leading to a more decentralised population and fewer personal journeys required on a day to day basis. Your shopping will be delivered by a drone (not necessarily a flying one), transportation of your person will be by an automated Uber equivalent (possibly flying but unlikely).
Major driving routes will probably have some sort of power infrastructure to allow continuous travel over long distances without needing to recharge an electric vehicle, this technology will supersede the benefit of flying for all short and most medium range travel.
May not change all that much, though this depends a lot on display and interface technologies. Currently these are the core factors in the design of a phone, you need a large enough screen and a large enough control surface. Should these be replaced by some sort of virtual projection then your phone could easily become a watch or headset. I'd err towards Pip-Boy/Smart Watch with projected interfaces if pushed.
*I'm English, we mix units, alliteration is better, sue me.