This is a huge benefit for PC gamers.
http://www.neogaf.com/forum/showthread.php?t=787883
http://blogs.msdn.com/b/directx/archive/2014/03/20/directx-12.aspx
http://blogs.nvidia.com/blog/2014/03/20/directx-12/
http://www.coveritlive.com/index2.php/option=com_altcaster/task=viewaltcast/altcast_code=503072b051
http://schedule.gdconf.com/session-id/828184
Forza 5 running on DirectX 12 on a Nvidia GTX Titan Black: PC Tech Demo.
https://www.youtube.com/watch?v=IwSzpuRR2FI
DirectX 12 is a competitor to AMD's Mantle API.
Both DirectX 12 and Mantle are low-level access API's. Also Known As (AKA) like "coding to the metal". Meaning video game developers can get closer to the hardware.
AMD showed with Mantle you can have more than 10,000 units on screen in strategy video games and run at 60FPS.
So imagine if Bethesda Softworks added support for DirectX 12 to all of the PC versions of their video games that they published and will be publishing in the future.
(I purpously left out The Elder Scrolls III: Morrowind because we got OpenMW ) Imagine the PC version of The Elder Scrolls IV: Oblivion getting a 64 bit executable support and DirectX 12 support, imagine the PC version of Doom 3, Fallout 3, Fallout: New Vegas, BRINK, The Elder Scrolls V: Skyrim, RAGE, Dishonored, Doom 3: BFG Edition, Wolfenstein: The New Order, and The Evil Within.
Imagine the mods PC gamers who are modders can achieve with this.
The Elder Scrolls V: Skyrim letting you able to place 1,000 NPC's in one place or 10,000+ items to be able to be dropped and still play at 60FPS.
ZeniMax Media Inc. and Bethesda Softworks how I wish you give us PC gamers this opportunity.
Make my dreams become a reality.
We PC gamers deserve this.