What happens if I buy a $100 bottle of wine and the rest is small priced cheeses and vegetables for a party? It becomes useless.
ETA: OK you're right - in the example they show, the prices are relative across categories. Not sure if A/B testing could be done to figure out which way is better!
Do you find this an everyday event?
It seems so.
> What happens if I buy a $100 bottle of wine and the rest is small priced cheeses and vegetables for a party? It becomes useless.
Sounds like an atypical every-day purchase for most people, and not what this is optimized for.
Between that and changes in perception about spending, I'm certain that supermarkets would not want this. It's too pro-consumer for their bottom-line.