I had a half hour debate in my head on this topic the other day; this is a great post thank you! I work at Walmart HQ and I think people underestimate their size and don't always consider what position that puts them in. They are investing heavily in private brands from grocery to apparel which will drive margins up continually over the next decades. I have heard that they are investing in some pretty crazy stuff to enhance the in store experience such as VR. We are actively cutting billions of dollars of inventory (I work in the supply chain) They are really taking a look at internal operations and reworking the organization the perform at a higher level. I don't know much about Amazon operations but I have a friend who is a vendor and he said they are a bad business partner while Walmart is a great business partner. Anything Amazon does with pricing Walmart is doing the same thing and we can push lower and that will not change for a decade. I don't think one or the other will "win" although most other retailers will die out. Amazon will get a big piece of the pie in the future but Walmart will never die, people love low prices (Walmart is synonymous with this) and customer service is going to be top notch at Walmart in 5 years as we invest in training, stores and wages.