This has given access to all the games files, including models, textures and sound. So beyond giving access to the likes of Lisa, Norman's model, the Fetus and of course the Hallway, we also have gotten a look at a few models that weren't actually in the game (to us, anyways). Users over on the Facepunch forums are currently compiling the models and porting them over to Source, and others have already moded them into MGSV: The Phantom Pain.
This is of course super interesting for fans of P.T. but it also has me wondering if this means ALL PS4 titles can be datamined now.
Turn me around and snap my neck if old, search turned up nothing.