Amazon is said to be interested in beating grocery stores at their own game by opening 3,000 more of its cashier-less Amazon Go shops over the next three years, reports Bloomberg. That could see it go up against major chains like 7-Eleven, Subway, and Pret a Manger – with the added advantage of zero checkout lines. To recap, shoppers at Amazon Go simply scan their phones loaded with the necessary companion app when they enter, and then grab the items they want, and leave. Smart sensors and computer vision tech help track what each person has picked up. They’re billed…

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