[Timesink]

But have no doubt about it, this product will continuously improve to the point that you can pack your groceries in them and have a roof over your head for when it rains and even have a GPS navigation system in them where you can punch in a destination and read the paper during your morning commute. Then everybody will want one.

By that point they would practically be cars, and almost as expensive.

[Skywalk]

I don't know if they'd be as expensive. Of course, to begin with they're going to be more costly, but after a few years in production, I don't see why something without the maintenance requirements, metal/composite construction or engineering constraints of an automobile would cost as much.

Also, cars cost a ton of dough to maintain and power. This might not replace the car, but it could be a good supplement.