Sony dropped a bombshell at their Game Developers Conference panel yesterday, revealing the Project Morpheus VR headset. However, the platform holder has a number of other developer-oriented announcements for the show.
Most importantly, middleware solution GameMaker Studio will be available natively for PS4, and it will be free for SCE-licensed developers. A popular solution amongst indie devs, games like Hyper Light Drifter and Home, and Nuclear Throne have all used the engine. With today's announcement, these studios are able to "more efficiently convert their titles."