Amazon is throwing open the doors to its first cashier-less grocery store, dubbed Amazon Go, in Seattle on Monday, January 22. The company first revealed its plans for its futuristic retail experience back in December 2016, describing how you could simply waltz into a shop with your phone that has the company’s app installed, pick items off the shelves, and walk out without bothering to check them out; you’d simply be billed automatically via your Amazon account.