Consider Amazon’s cashier-less, cashless, and auto-pay grocery stores, Amazon Go. These stores deploy scores of cameras that track every customer by way of facial scanning as well movement tracking and gait analysis. A customer can pick up and put down whatever they like, then simply walk out of the store, having paid for only what they took with them. In the future, this sort of tracking system will be used to reproduce these users, in real time, as digital twins.
