Here is what NVIDIA had to say about it,
We’ve been hard at work with Ubisoft implementing new technologies to ensure unmatched visual fidelity in the PC version of Far Cry 4. Semen Kovalev, the producer at Ubisoft for the PC version of Far Cry 4 introduces you to some of the techniques and technologies used to enhance the game.
Take a look at the new video below:
Far Cry 4 will release November 18 on PS4, PS3, Xbox One, Xbox 360 and PC. You can pre-order now here.