I doubt it is using DirectX 11. While that would probably be a smart thing for Sony to do - as it would make cross platforming much easier, designers seem to like it, graphics on it look amazing, etc. I doubt they would use it. Even-though they are a Microsoft partner (with PC Manufacturing), they seem to hate Microsoft.
They, like the Wii (and I assume the WiiU) will be using OpenGL.
Put part of me hope that Microsoft launches with DirectX 12. As we will probably be stuck with that version for a while and I would want to have the most innovative.







