Also see Amazon Moves to Cut Checkout Line, Promoting a Grab-and-Go Experience (NYT) and Amazon Working on Several Grocery-Store Formats, Could Open More Than 2,000 Locations (WSJ); also see Amazon: No, we're not opening 2,000 stores (CNET)
"What is Amazon Go?Amazon.com: Amazon Go
Amazon Go is a new kind of store with no checkout required. We created the world’s most advanced shopping technology so you never have to wait in line. With our Just Walk Out Shopping experience, simply use the Amazon Go app to enter the store, take the products you want, and go! No lines, no checkout. (No, seriously.)
How does Amazon Go work?
Our checkout-free shopping experience is made possible by the same types of technologies used in self-driving cars: computer vision, sensor fusion, and deep learning. Our Just Walk Out technology automatically detects when products are taken from or returned to the shelves and keeps track of them in a virtual cart. When you’re done shopping, you can just leave the store. Shortly after, we’ll charge your Amazon account and send you a receipt."