WalMart is smart. They know that this is going to go the way of nutritional labels: nobody cares ! They buy what they want anyway.
When they point out that, despite labeling, green products do not sell ( much like salads at MacDonalds, they'll have made their case in a way that the green people must see: no body cares !
Of course, then the green idiots will try to force people to.They'll be shown to be the totalitarians they are. It's not about green; it's about CONTROL.
With more products being made that are IP based, new construction gets tons of tax incentives to utilize connected building products including IP lighting, IP HVAC, IP Security, IP door strikes etc. LEEDs certification helps out initial costs and give the company some damn good press.
In the long run, it keeps the construction costs high, but the ROI is solid. It also does not hurt they they can now get away from proprietary products and companies that they must use their software.