No one said they didn't track anything already. But they don't have the full picture yet. Many people pay cash for things. Currently no tracking if you just visit somewhere and don't pay for anything. Not everyone has GPS enabled on their phone.
Ubiquitous facial recognition fills in all of this missing data well enough, and without you doing anything but walking out your front door.
Ubiquitous facial recognition fills in all of this missing data well enough, and without you doing anything but walking out your front door.