PS4 FW 2.0: Friends can Play Your Games without owning them

The best way to think about Share Play is like a "virtual couch". PlayStation 4 will create an online local co-op experience by allowing you to invite a friend to join your game—even when they don't own a copy of it. With this first-of-its-kind feature, you'll be able to play games with a friend just as if you were together in the same room.