It's a terrible metaphor, or at least it argues against your own position. If flying cars were in fact something on the horizon, we would need discussions about

It's a terrible metaphor, or at least it argues against your own position. If flying cars were in fact something on the horizon, we would need discussions about air spaces, commute lanes, and traffic rules. Otherwise lethal mid-air collisions would be much more probable, resulting in significant bystander and property damage as these wreckage fall out of the sky. And, no surprise, we're seeing exactly this discussion going on right now about drones.