I can't help but think there are going to be significant unforeseen consequences of this -- consequences that will give rise to business models we haven't even begun to consider yet. Off the top of my head: why have retail stores to which you have to drive 5 to 15 miles? Put a densely packed warehouse (one that looks more like a large home than a warehouse going ten levels below grade) of the most commonly needed groceries right in a cluster of neighborhoods and orders can be made online, picked by robots, and delivered by autonomous vehicle (and restocked from larger, more central warehouses in a similar manner).
And kicking it up a notch: how about the domestic robot signing for the order and beginning dinner preparations with the just-in-time delivered products while the humans in the house... well, play video games....