I've been wondering about this, and I think it's totally doable so long as you don't get stuck thinking about a literal "robot delivery man". The model I was c

I've been wondering about this, and I think it's totally doable so long as you don't get stuck thinking about a literal "robot delivery man". The model I was considering was more along the lines of 1) park as close as possible to the target address 2) send SMS notifying the recipient that you've arrived. 3) recipient has a 5-10min window to go out to the waiting truck, swipe a card or whatever for ID purposes, and receive the goods. It's a somewhat different experience to a human knocking on your door, but I'm sure it could be made to work. Automated delivery vehicles may be able to do better in terms of offering a choice of delivery time, and sending accurate estimates of arrival time. There's considerable scope for doing a better job of delivering to households where there is usually nobody home during "working hours".