For me, this is useless because Instacart delivers everything I need with no markup, save tips, for $80/year. Perhaps this is wildly unprofitable for them, but for now it's far better than going to the store parking, shopping and driving back. I save many hours a week for hardly any money. If self driving cars get perfected, they won't even need drivers! Amazon Go might as well be a robot that automatically steers and buggy whips my horse drawn carriage.