I did a little reading on the Vision upgrade Sprint is doing, and from what I can see it benefits us as well (explains why in areas that it has been done people start having WiMAX where they haven't before). Their plans could pay off for them as they switch iDEN towers over to the multi-mode wide band towers.
Sprint Chooses Radically Different Approach for LTE Network, And It May Pay Off
Sprint Chooses Radically Different Approach for LTE Network, And It May Pay Off