I'm not really buying the whole "Sony's gonna do it too" narrative here. This sort of used-sales system takes OS-level support, and a huge networked system of Point of Sale access points.
Tretton has just stated very clearly, they're not implementing that. Not an an OS level, not at an infrastructure level. So, it will make it very hard for publishers to do anything that gives a decent User Experience.
According to sony:
""As announced last night, PS4 will not have any gating restrictions for used disc-based games.
When a gamer buys a PS4 disc they have right to use that copy of the game, so they can trade-in the game at retail, sell it to another person, lend it to a friend, or keep it forever."
http://www.polygon.com/2013/6/11/44...ty-publishers-can-dictate-their-own-drm-terms