I'm not holding my breath on DX12 or cores. For how long Win10 has been out the first game I know of where DX12 is universally faster than DX11 or lower has JUST been released--Sniper Elite 4. It may be the first that had the benefit of using it from early in development (not counting that Ashes game I never cared about).
I know Tomb Raider used it but IIRC the reviews indicated for some cards DX11 worked better.



The Jedi Master


The anteater is wearing the bagel because he's a reindeer princess. -- my 4 yr old daughter