The Playstation 4 scene has had some interesting developments happen lately with homebrew running via blu-ray and now thanks to Robert Sebov, we have a leaked SDK testing kit files. It’s one of the largest Dev / Testing kits for the Playstation 4 (DUH-DUH-D1000AA DevKit and T1000AA Testing Kit).
The Authoring Tools Framework (ATF) and the LevelEditor for the PlayStation 4 were released earlier this month. I would recommend you follow the author Robert Sebo on Twitter or Facebook to keep you updated. So if your curious and want to take a look, here are the files.