It will start slowly, as every high end expensive technology out there, e.g. "horseless carriages", pocket watches, motorcycles, computers, cell phones ... etc. They were at the beginning expensive "toys" for the reach and wealthy, but as the technology progressed it became cheap enough for everyone. So I'm not worried about traffic jams in the sky, when there are more air vehicles in the air, I assume technology will progress enough to maintain separation and not cause problems. I guess an automatic traffic avoidance system could work as a virtual "force field", you fly "virtual" VFR, if you are to intersect another aircraft path or bump into buildings and obstacles, the system will not allow it, automatically redirecting you.
Usually a computer is just a tool to help performing some tasks for most jobs, and there's still need to be in an office, e.g. for me, I'm designing hardware and embedded software, I need to prototype boards, test them and fit them into equipment, so not all of my work can be done from home.
Anyway, what my point here is, to stay on this thread topic, the electric propulsion is good enough even now for the typical commute.