Visiting your favorite grocery store to purchase that family rotisserie and other products is now an app or cart scan away. Checkout-free technology like Caper and Grabango are becoming commonplace. Amazon pushed traditional shopping norms June 17 with its Just Walk Out technology in The Marketplace at Factoria in Bellevue, Washington. Sensor fusion, deep learning and computer vision combine for the technology to work. Allowing shoppers to save time, limit contact in Amazon stores.