There's several things that are true in this thread:
1) NWA is a toxic area. Younger workers coming out of college do not want to come here AND stay here. So, there's no long term young labor growth potential to sustain company growth.
2) Executives and high level managers for the other business units (Jet, Hayneedle, Bonobos, Modcloth, etc) don't want to move their families to NWA. Can you image what executive and high leadership meetings are like when this topic comes up? Those people are contract employees - they have employment contracts in place and some of them might have location/relocation clauses that gives them leverage to avoid Bentonville.
3) CEO level leadership for Walmart will have to change in the next 18 months to avoid the eventual issues between Marc and Doug and the board. As the business moves more and more to the future (online) the way of doing business and reacting to trends and buyers habits will have to be much faster and much more creative. Jet already has that mentality. It'll be easier to simply get rid of the "Old" rather than trying to "fix" it. That means there's going to less and less of a presence in Bentonville as important decisions and strategy get done in other locations.
4) It's easy to change plans plans when virtually nothing has been done yet. These "plans" to bring up a new HO can get tabled with a simple vote and stroke of the pen.
More probably, what we're going to see is a massive resource shift to India, California, New Jersey and other high tech locations, such as Austin. Some administration might stay in Bentonville as a nod to the Walton family and pressure from the city/county to keep a presence there in order to keep the local economy from collapsing in.
But, anyone who thinks Bentonville is going to be the mecca of Walmart 24-36 months from now is simply not living in reality.