I think the actual reason is much simpler: The profit margin on it is really small. They probably have to pay $190 or something like that to stock it at all. Stores will be willing to pay that if they know consumers will buy movies, but sales on any nextgen format are pretty low.
Game systems do the same thing. Stores pay nearly retail price to stock Wiis, but they pay it because people buy games. I'm guessing that's the problem here, though Wal-mart would never admit it.










