The relatively low cost of UAVs would allow more widespread use than full size crewed aircraft.
I can forsee the day when someone lost or injured can be searched for not by A drone, but by a whole fleet of them.

In many cases the same vehicles could be used to monitor crop yields, to inspect overhead utility lines, and for many routine law enforcement purposes.
In the case of a serious fire, observation via a UAV would allow firefighters to deploy the available rescources to the best effect.

I consider it probable that these vehicles could be used for commerical or industrial purposes a lot of the time, but with arrangements for speedy hire or loan to TPTB in case of need.