A new phase in data collection is underfoot. Retailers are using floor sensors to track movements and gain insight into consumer behavior, AP's Ivan Moreno reports from Milwaukee:

• "[T]he sensors read a customer’s unique foot compressions to track that person’s path to a digital display and how long the person stand in front of it before walking away...the floor sensors can tell a retailer the best time to offer a coupon or change the display before the customer loses interest."

• Another way they watch us: "Sunglass Hut and fragrance maker Jo Malone use laser and motion sensors to tell when a product is picked up but not bought."
• "The sensors can also be used in office buildings to reduce energy costs and in nursing homes to determine when someone falls."
• But retailers make up the majority of customers for Milwaukee-based startup Scanalytics, which makes the sensors.