I was under the impression that PSGL is being abandoned for a less proprietary implementation of OpenGL ES. All that means is more optimization requirements for old software nobody will want anyway. I can see DirectX games taking less effort on Microsoft's console, but it's a coin toss as to whether or not developers will just port their PC games (already on PS3) to PS4 natively, providing they have OpenGL optimized versions to push out. If Steambox continues to market with focus on Linux, it's going to make that even easier to justify development costs on.