NFC TIMES Exclusive Insight – Ecommerce giant Amazon expanded its no-checkout concept to its first “full-sized” supermarket Tuesday, in its headquarters city of Seattle, enabling shoppers to scan an app upon entering, pull products off of shelves and “just walk out,” with hundreds of cameras and numerous sensors having recorded everywhere the shoppers went in the store and everything they put into their shopping carts. A card on file in the app is charged as the customers leave.