I imagine a future where there will be a perpetual swarm of autonomous vehicles that have basic security and surveillance cameras connected to the internet of things etc. and these auto-vehicles will drive around delivering goods, etc. And if they happen to be solar, they can just park for the rainy days with your goods inside until they're charged up again. Refrigerated and frozen goods would not be allowed to park though.

Maybe these auto-vehicles might even have security drones to follow you, should you feel like liberating their contents.

I love hard sci-fi.