Perhaps not but the basic layer will be there and I guess they will use compute instead of Jaguar cores. I don't know for sure about the avanced GPU Physx effects, usually they require CUDA (so Geforce exclusive) but who knows, that could change. I'm not disputing the fact that GPU Physx makes a difference.
I guess we will see that when Nvidia will start promoting Arkham Knight and bundle it with their 960 / 970 / 980 / Titan X cards.
The face and eye effects wouldn't necessarily require re-authoring by artists. The shader could simply fall back to something else on PS4, I'll grant you that it's the msot likely one to be included on all platforms though (or at least PS4).