I agree, but it also seems trivial for Amazon to integrate this into their Amazon Fresh service which is grocery delivery to your house.
When you finish walking around shopping you put your basket/ cart into a waiting slot and some Fresh delivery person grabs it and loads it into their truck. They already have your payment and shipping information too.
Good point. Well, they automated the checkout process (through some "machine learning" "computer vision" black magic that I still don't understand). They might as well have it so that the items in the waiting slot get picked up by a drone that gets it to your place before you even get there.
When you finish walking around shopping you put your basket/ cart into a waiting slot and some Fresh delivery person grabs it and loads it into their truck. They already have your payment and shipping information too.