This dream is naive. One truck rumbling (or humming, in the near future) through your neighborhood delivering packages to each of your neighbors over the course of 30 minutes will be replaced with one drone per neighbor.
If they must exist, I hope they're priced/taxed such that they're used sparingly.
Bit of a travelling salesman problem, but I think a hybrid approach would be optimal. Have the delivery van drive to a neighborhood, then release drones from the van to deliver packages to individual houses.