I'm guessing faster Street view updates could be next. Park the car, release bunch of drones (permission from the town is no problem, it's good for local businesses), have all nearby streets scanned in a few minutes. Eventually have a base station in each city and do daily (hourly?) updates.
That may be true in a small number of very pro-technology cities in the US, but I think it's far from the case around the world in general.
Btw, I think the point has been missed here a bit. Autonomous drone technology has been available for quite a while, and is used for use cases like the ones you describe (but usually on private property). The new thing here is drone racing - very high speed, high precision flying.