A bunch of grocery stores here on the West Coast are replacing their self checkout lines and going back to checkers. They're saying that it's to "improve the customer experience" but people in the industry know (due to tests done by other retailers who bypassed the technology once they tested it, like Costco), its because of product loss/shoplifting. I know it's not apples and oranges but I do think that the loss margin is going to be so high on this that only Amazon will be able to eat this -- and I think they know this.