Several months ago we shared a story with you about Amazon and their new Amazon Go store in Seattle. This store features a check-out free concept. Pick up what you want and walk out. This concept has apparently worked well for Amazon and they are opening a second store in Seattle that's even bigger. Also, since that first store opened there are reports that say Amazon is going to open as many as six additional stores. Two of the confirmed stores will be in San Francisco and Chicago. Hopefully this concept will spread to other retailers and help to ease the issues of long check-out lines and moody cashiers. Bring it on. The store relies heavily on the Amazon Go smartphone app. Customers scan a unique QR code within the app before passing through a set of glass doors, similar to the gates Amazon employees go through when entering their office buildings every morning. A vast array of overhead cameras and weight sensors in the shelves automatically track what people pick up and take from the store.