It would be affordable for society to ensconce the homeless aboard this system.

This could also work as a jail system: fix it so that the doors only open from an external command. The inmates could be moved about at the whim of the person in control.

Apartment living might decline but sprawl might be worsened because a long commute to a remote home would be very easy. Remote living at a location that never had a surface road would be no problem.

The biggest problem that I can see to this system would be clutter in the view upward from the perspective of the ground. The view while one was aboard would from on high and very good. The routes would have to be carefully placed to avoid visual clutter. The system would be very quiet and no lighting need be associated with it in any way. In cities the routes could run along property lines, thru alleyways, along easements. In other words the system could be behind you and out of your field of view to the front.