I don't know if this old news but it seems like Sony won't be implementing DRM against use of 2nd hand games.
http://www.cinemablend.com/games/It-Official-PS4-Feature-Used-Game-DRM-Like-Xbox-One-56264.html
http://tech2.in.com/news/console/so...4-will-not-have-drm-against-used-games/875088
Probably the best outcome for everyone involved. Customers aren't screwed on everything, publishers get their way and Sony don't lose important publishers.