“Where the rest of us see subway walls, Tesco's South Korean supermarket chain Home Plus sees grocery shelves. In a trial run, Home Plus has plastered a subway station with facsimiles of groceries, labeled with a unique code for each product. As commuters pass by on their way to work, they can use a mobile-phone app to take pictures of the products they want, then check out. The groceries are automatically delivered to their doorstep by the end of the work day.”
MIT Technology Review
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