Presonally, I think the UPS, Fedex and USPS pevople are on the chopping block first.

Autonomous trucks with a robotic shelver (like in old tape libraries for computer backup), automatic sliding port doors on the roof and a set of recharging drone docking ports on the roof. The AI truck drives down the main road in the subdivision and the robo-shelver moves packages according to GPS coordinates to the loading platform. The drone (like a mini-cargo copter), picks it up, flys up and away over the houses to drop at the door of the designated house. The truck keeps rolling with multiple drones flying out over a radius of a couple miles (whatever works out economically).

The drones drop the package, notify via SMS Txt or email that the package is delivered and away it goes flying short cut over the houses back to the truck.