X1 already has a custom, unique API so to get the high performance it will use that rather than dx12. HOWEVER i'm sure that some of the new features of dx12 will be shared with the X1 API , such as tiled resources, if I remember correctly.
And meanwhile SCE software engineers, team ICE and Razor team are sat twiddling their thumbs doing nothing. Or not.
PS, PS2, Gameboy Advance, PS3, PSP, PS4, Xbox One







