I'm running at a solid 60FPS, with FOV set to 100, and I even added the SweetFX mod to make things a bit less washed out looking. Everything but God Rays are on Ultra, at 1080p.
My rig:
i5-3570k OC'd to 4.2
GTX 970 FTW
16GB RAM
Haven't noticed any issues yet, and I am about 5 hours in so far.
BTW I think the game looks surprisingly good. After finally building a PC that can run games at 60FPS, though, I don't think I can ever go back to 30 or even sub 30. It just doesn't feel right anymore.
My friend is getting this for PS4 tomorrow so I am going to see what it feels like compared to PC.