Imagine this. You walk to a shop on a busy street. The moment you pass by a rack of t-shirts, a screen besides the hangers light up.It suggests matching pants based on your online searches and reminds you there's a 15% discount if you buy both the t-shirts and the pants together. Across the street, a woman is scanning her face on the app. Her phone instantly popping out a message.Your perfect lipstick color is number 237. Meanwhile, a label on the shelf flashed warning her that there was only three life in ...