I meant it quite literally. Another multi-billion dollar company needs to be willing and able to spend the same level of resources and time. Wal-Mart or Costco itself would have to be willing to produce their own hardware.
Yeah, I fully realize it's never going to happen. It's a hypothetical to illustrate just how high of a hurdle it is. It won't happen organically, there needs to be a strong driving force with the financial backing that rivals that of the competition.