IF... IF Walmart gets their act together Amazon can do nothing. Say you are a college kid and you want a baby fridge for your little dorm room. You can order it from Walmart free shipping and pick it up at a store. Amazon has to pay to have it delivered to your dorm. For Wally it comes on truck that were driving there anyway. Same with HomeDepot. I buy online from all three when it makes sense.

That kind of a price war would destroy the non-existant margins Amzn already enjoys.