Adding a dose of Marty McFly into the mix...
Where is my self-driving hover-car?
(Aaaand throwing in a Star Wars reference, too!) Like on Coruscant, vehicles travelling in different directions could fly at differing altitudes. I don't mind if they are controlled centrally, to ensure that they stick to a lane. Maybe when they sort out quantum computers properly...
I would like to see one in my lifetime, even if I don't end up owning one.
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