You're forgetting that for brick and mortar stores which already have an efficient supply chain built for getting items to their stores it might be more expensi

You're forgetting that for brick and mortar stores which already have an efficient supply chain built for getting items to their stores it might be more expensive to get an online supply chain in place. Physical stores still make money: especially WalMart, which tends to cater to lower income groups which may not even be shopping online. And they don't have the online volume yet to reduce the prices as much as someone like Amazon.