The world on time... and in pieces.
I'm generally not in favor of replacing human jobs with robots, but I'll make an exception for the idea of replacing delivery people with drones. These drones may well deliver things to the wrong address, they may drop packages accidentally from great heights, and they might rise up and enslave their human masters. But at least they won't drop-kick your package onto your roof, because a.) they don't have legs and b.) they don't have the programming to hate you and your stupid packages and this stupid job. Not like these humans.