Try to imagine this:You get off the train with an empty stomach and start looking for a supermarket or shop where you can buy a quick snack. Suddenly you find yourself in an empty shop, but it looks open. No service, no long queues and shelves full of a wide variety of products. You grab your snack, pay it at one of the self-scans and easily walk out of the store!Sounds like a science fiction movie, right? Because how often do you come across a 24/7 unmanned, data-driven store with a wide range ..