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.
> The Lilium Jet engine has been fully developed in our in-house sound lab where we have used proprietary acoustic modelling software, simulated on high-performance computing clusters, to optimize its design. 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. On the ground, the aircraft will move to and from parking bays using separate electric motors, allowing it to be as quiet as a typical electric car.
The usage of future tense (will be) makes me somewhat skeptical
I don't really want to experience what Kobe Bryant experienced though.