

What I mean is that the displayed price and register are always in sync.
Realistically, I feel like it would mean that they can only change prices during shutdown hours (or perhaps VALID UNTIL prices for changing mid-day). Changing displayed prices manually each night is too much labour to be worth it, but with digital labels, it could be done.
More dystopian, I’m sure at some point Walmart will be able to track each person to display a unique price when they are looking, and that displayed price can follow them to the register.

Nirvana - The Man Who Sold The World