Comment by autoexec

Yes, it's happening in brick-and-mortar. They've been conditioning people to accept the idea that prices will differ depending on who is doing the buying through the use of apps and loyalty cards (https://web.archive.org/web/20201111164410/http://www.nytime...)

They've known for a long time now that their profits will go through the roof if they can get away with it, but the fact that consumers find the practice offensive has held them back along with the cost of initial investments in things like digital price tags and facial recognition systems (https://link.springer.com/content/pdf/10.1057/s41272-019-002...) but all of it is coming. The big chains have already started. By the end of this year Walmart should have digital price tags in every store. Facial recognition is spreading too (often using loss prevention as an excuse). The grocery chain Kroger announced they'll be using facial recognition to offer different prices to different people. Their digital price tags scan faces, and your track appearance and behaviors, like how long you spend looking at various products.

It'll be simple for stores to do things like charge people more when their cameras see them wearing expensive clothes, or when the data collected from their app shows that they live in rich neighborhoods or when they can use the data they collect on you in combination with information from data brokers to learn what your income level is. I fully expect things to get even weirder like stores setting higher prices for people with the wrong opinions or political views. Algorithms will be caught "accidentally" discriminating on things like skin color and gender.

There's a little bit of pushing back against that kind of things in some places, but with the massive amounts of money on the table I expect that politicians will be bribed to allow it.

> If I happen to see the price tag change from $3.49 (perhaps set for the person in front of me) to $4.49 and I put that item in my cart, which price am I getting charged at the register?

The store shelves have cameras in them. You won't see your price until the system detects you. They can even display your photo/avatar next to the price so you know that it's for you. Facial ID at the register tells them who you are when it's time to pay up. That's just for now though. Eventually it'll likely all happen in a cell phone app and you won't be able to as easily look over someone else's shoulder to see what price they're paying.