At least the article was not: "Dynamic pricing labels are easier for the most vulnerable segments, especially women, children and the elderly to survive."
The real impact will be the elimination of the low-wage worker that used to run around the store changing price tags to match current specials, removing expired specials, and generally make sure everything is marked on the shelves.
Question - Are grocery stores required to post prices on shelves?
Once upon a time, stores had inventory behind the counter, and a clerk handed you items and told you the price...
Then we put product out on the floor - self-serve, and each item was individually priced...
Then we put price tags on the shelves, to reduce the labor involved in pricing items individually...
Now we are going to have centrally-updated shelf tags...
At every change, there were likely vocal opponents that believed it was a scheme to screw the consumer, but the screw never materialized.
If a store ever got caught changing prices during open hours it would kill the trust the store built-up with the customers - no sane business would risk it.
I worked in IT at a large grocery chain, the margin on items is hella-small, typically 2-3%, and while I worked there someone sent us a pre-press copy of a competitor's upcoming advertisement in the local paper. My employer called the police, alerted their competitor, and went all-in telling employees that we don't do things like that and won't tolerate any employees caught doing something similar.
Grocery stores are profitable, but most of their energy is invested in lowering costs to keep prices low, lower than competitors.
Grocery stores are a volume/efficiency play