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Where stores know your gender and your mood. with one new technology, they can even anticipate what you might want. thats a cupcake store in san francisco trying out a tech built by a company. >> if you like the red velvet cupcakes, you probably like the combination of cream cheese as well as cake and we recommend the pumpkin cheesecake. >> amazon is an incredible experience online. >> they want 20 bring that experience off line. >> off line retailers need to be able to recognize you. >> reporte...