Self driving is something that may be solved and can become practical for popular use with current and near-term foreseeable technology. Everyday mass use VTOL is not. Sorry, the Jetsons lied to you.
The modifications probably required huge trade-offs in cost/performance and might still not be quiet enough for daily use in urban/residential areas.
Lilium boasts: "As well as a customized electric motor, it contains innovative liner technology which means the aircraft will be inaudible from the ground when flying above 400m and will only be as loud as a passing truck while taking off." https://lilium.com/the-jet
Many companies are working on this problem currently. I would say consumer accessible, piloted electric VTOL is closer than fully self driving vehicles.
They're working on nullifying gravity? Cool.
No kidding. They promised Rosie and we got Roomba.