It's likely traditional retail that falls by the wayside is going to make room for more competitive retail that leverages this information to its advantage in a

It's likely traditional retail that falls by the wayside is going to make room for more competitive retail that leverages this information to its advantage in a way ecommerce sites can't. Consider Amazon Go (https://www.theverge.com/2016/12/5/13842592/amazon-go-new-cashier-less-convenience-store)---after https://www.theverge.com/2016/12/5/13842592/amazon-go-new-ca... setting up an account with a store, users enter, grab what they want, and leave. The system of cameras and biometric trackers observing the store figures out after-the-fact what you grabbed and charges it automatically to your account through a sensor fusion including face recognition. That's a level of convenience rivaling ecommerce for things people want to grab by hand (often produce and small items, for example), and it's completely enabled by this category of technology.