In the future, I can imagine having drop off zones (one for every block, e.g. upgraded food/newspaper kiosks in very high density areas), where you can gather your packages if you provide the correct code/QR image. Or even pay only if and when you pick it up?

I can already order groceries online and pick them up myself for a small fee, here in Austria. Using drones would just take it farther and quicker, and I would have a lot more choices available. USB-C adapter I need for my new MacBook RIGHT NOW? Check. That new book? Check. Exotic batteries for my audio equipment? Yep.