Abstract: The disclosed principles provide for various embodiments of a “smart” product display system capable of learning consumer shoppers' behaviors and preferences, as well as interacting with shoppers, retail personnel and product suppliers, in real-time. Exemplary goals for the disclosed product display systems and methods include understanding shopper behavior and trends by actively measuring inventory on the shelf in comparison with shoppers' demographic information, “sensing” the shoppers that stop by the rack and identify their demographics to show relevant advertisements to such shoppers; and validating the performance of internal techniques, or developing new techniques, for targeting shoppers as compared to actual shopper preferences determined by the smart product display system.