It takes a third party to orchestrate busy sections of our current flying vehicles, planes, so I can't see any alternative to full automation of a mass of flying cars.
In a sane world we would have only segregated rail transport in urban areas and cars in rural areas where the population density is less than 10 people a square mile.
https://en.wikipedia.org/wiki/List_of_countries_by_traffic-r...
Though there are better places than the US, quite a few countries are willing to put up with absurdly higher risks.
If I'm even 10 metres under the ground, flying at 50km/h, if this device fails, of the battery runs out, you're not gonna live to the tell the tale. There is no parachuting, no way of gliding safely to the ground (like planes and helicopters). What is the safety net?
I can't ever see a world where even a minority of the population adopt flying cars. The chance of catastrophic failure (death) is too high.
Edit: After reflecting on this I realize that airplanes probably fall into these statistics, at least for catastrophic failure anyway. I'd be curious to examine statistics in more detail to figure out what a comfortable level of risk would be, but for now, I guess I fall into the ranks of your typical armchair critic on this one.
Can't imagine the stupid s%%t some are going to do in 3D.
So back in the day (fault of bad meds) I was sometimes a crazy driver. Poor impulse control. Drive it like you stole it. Whatever. But hey. I'm still alive, and I never got anyone else seriously injured or killed.
But anyway, one afternoon I was doing slalom at ~90 mph through ~70 mph traffic. And then, out of nowhere, this dude on a racing bike blew through at 140 mph or more. And we were all damn lucky that I saw him just before using the same gap that he was heading through. It would have been a serious mess.
I do other things.
I live on Moffett Field next to the 101 -- the vehicles from the 101 are far more annoying than the airplanes. Just listen to traffic noise pretty much in any urban or suburban environment. The Caltrain sounds like -- well, a freight train. My point is that if we cared about noise pollution, we'd be paying more attention to the everyday noise all around us and developing technology such as a hypothetical road surface that absorbs sound or finding ways to make the loud train horns unnecessary. The noise from trains and roads is far more obnoxious than any airplane sounds.
I can't believe we haven't cut & covered the Caltrain line yet. I imagine that's a project even the plentiful peninsula NIMBYs could get behind.
As sibling points out, airplanes at moffett are rather far away, whereas these flying bikes are meant to be point-to-point in dense environments. Also note that there's lots of regs & techs that help reduce noise for larger planes, and I'm not sure the same is going to be true for these smaller vehicles, similar to how all those two-stroke lawnmower and leaf blower engines are horrible both environmentally and noise-wise because they're optimized for size.
Nowhere else I've been are trains so obnoxiously loud.
The driving skills that we take for granted now, that seem to come naturally for so many people, were totally nonexistent a little over a hundred years ago. Our brains can now process lots of things moving at different rates of what would have been bewildering speeds to any human not that long ago. We negotiate traffic and anticipate tricky situations and have developed rules that help coordinate the chaos.
Yeah, there are a lot of collisions and deaths all the time, and there are a lot of people who aren't great at it. But even the not-great ones are capable of something that nobody was when the automobile was introduced.
Lots of things turn out better than we expect just because most people don't really want to die. If it were possible for people to fly around overhead in some kind of personal vehicles, my guess is most folks would learn how to handle it.
[1]: Best I could do for now: https://www.detroitnews.com/story/news/local/michigan-histor...
Humans are generally dumb and inattentive, and this particular vehicle looks like it would attract especially dumb humans who'd use them to try dumb things. Since they won't need any piloting certification, this is basically offloading risk onto everyone on the streets below.
I'd feel more comfortable if this were automated only. Then I'd at least be assured there'd be an organization held accountable, rather than a risk-seeking human who'd be dead anyway if it crashed.
If it were automated and had perfect mechanical reliability, then the only real issue is the noise pollution. Which still is going to be an issue, because these jets put out significant noise, and I haven't seen anything in the last 10-20 years since Moller's flying car prototypes to suggest that progress is being made there.
I love scifi as much as the next person here, but there's a lot of problems to solve before we put loud flying missiles in the hands of untrained adrenaline junkies flying over population centers.