Quotes from the news wire:
When you as a consumer, when you find it convenient for you, you call up the delivery using your smartphone. And then the robot gets loaded with your parcel in our hub and it drives to your doorstep. And that takes about 20 minutes. So instead of having a delivery window of half a day or something that you're getting your delivery sometime during today; you can pick a delivery window that is like ten minutes.
It's safer than a flying drone. People actually do not like low flying drones, especially when they are flying over their backyard and it's a buzzing, flying machine. If it's doing a delivery for you maybe it's okay, but of it's doing a delivery for somebody else, you know, people don't like that. People don't like other machines flying over their backyard where their children are playing. So there's huge social acceptance problems with the robots, with the robots that are flying. But not so much for the robots that are land-based, and safe, and look cute.