Recognize that this, despite assurances, will be used to gamified pricing, just as McDonalds is doing now. I am sure prices will be "consistent in every store" but few will pay those prices because they will be much more than normal. However, if you've shopped at Walmart in the past week that's 10% off and if it is a Tuesday morning you get that extra 5% early bird price and if you spend at least $100 you will earn 10 WallyBucks or whatever waste of time gamified coupon scheme they come up with.

The gamified pricing won't be done through the price labels, but through Loyalty Programs, Apps and Coupons.