If Sony were at all smart (granted, I have seen no evidence to support that) then they would make damn sure their marketing for the PS4 highlighted the fact that you can still borrow, rent, and buy used without extra fees.
When you're fighting to establish marketshare, I don't know if that's wise. If I'm EA or Activision or a small developer, is prefer the platform that would protect my software from piracy and second hand markets as a rule. I might even offer extras on that platform to encourage adoption. That's why I say it's more than likely that both are doing similar things to protect developers. If one is doing it, it's likely the other will too.