Funny enough, if you find the same products at other stores, they are the same price. I think Walmart thrives by offering a diverse selection of inexpensive offerings, not by pricing identical items lower (to reflect their lower workforce costs). For example, videogames cost the same at Walmart as they do at Target. To see a different price for a specific item, you have to go to a very different type of store (Sam's Club/Costco).

I think it's fair to say that even if Walmart could half their operating costs with technology, those savings would not find their way into the pockets of consumers.