If Nvidia can get DX 12 support ALL THE WAY BACK TO FERMI GPUs then I'm sure AMD can at the VERY LEAST SUPPORT DX 12 with their GCN GPUs which support mantle. 

DX 12 is not something new. It's practically a consolization of directx for the PC space for more access to GPUs. AFAIK it doesn't require new features from a GPU such as DX 11 enforcing tessellators to be on GPUs. 

I'm with you there too.  It's sort of like making people buy new cars to go on new freeways because you don't like the current ones.  Come travel on our steam powered freeways they cry!  But we already have more that will go to all sorts of places, the people respond.  But ours are somehow different?  But the people respond, I can by ones that can travel for games, but also be used for other things, I think those are better.

Another thing this will do keep DirectX 12 as a lead platform.  So companies can still develop and use their years of experiences on DirectX for Xbox, Tablet and PC (even phone if they want.)  While SteamOS will have to work hard to try to get people to switch to their new platform.

As far as Xbox One, I’m sure we will see some improvements.  Just look at the development of Xbox 360 launch games, to the ones today.  They look a generation better.  Even a modest improvement would be good.

I think SteamOS it Gabe's dream of killing Microsoft and Windows.  Why, I really have no idea, as his consumer have more of the latest software from Microsoft than the general public by twice.

Perhapse Bill Gates stepped on his foot once, or ate his cupcake. It really seems silly and a waste of time, espically with the new DX12 coming.

If they had put the same effort into new games we might have Half Live 3 or Portal 3.

But hate is a passion, like love, it's not rational.

Well anyway most people will make their steam box dual boot anyway... And I hardly see why PC gamers would buy one...

I might get one if they do cheap ones just to play Indies that don't make it to consoles...

I noticed that and was wondering if that was due to Nvidias architecture or if it was not hardware bound for the first time.

How will it do that?

They say DX12 is a console like API.  XB1 is already a console.  If it has a boost it would only be because their current SDK is bad.

Nah, it's not like that.  Think of it as like a super optimizing driver.  Only it will give you one platform that does what Steam wants their new OS to do, but with the years of experiences that developers have working on DirectX. It's like a new OS.

Xbox One should get at least a 20% GPU improvement according to what we saw today.  Perhaps significantly greater.

Unreal Engine 4 will get upgraded to work with DirectX 12.

It will be the new standard for is flexibility, scalability and power.  PC and Xbox One games will both benefit.

I'm shocked to see all the Steam OS hate in here. Honestly, Valve's Linux push was like a godsend for me. Linux gaming has exploded since steam first landed. Two years ago the only game I played in Linux was Teeworlds, but now I have 40 native Linux titles. There are even Cryengine and Unreal games Linux bound now. Things are finally looking up.

OT: Mantle, DX12, and OpenGL14. It's great to see this sudden, massive push to improve PC game performance. Makes me think that just maybe my dream of going 6 years without upgrading anything besides my GPU will actually be realised.

It's not hate, it's just a dream,that will never come true... Or at least in the near future or not with valve.... Linux user base hasn't moved a bit in forever it oscillates at the bottom between 1 and 2%.... And steam OS won't change that... Most people won't use Linux... And most gamers either...

I didn't see info that imply 20% or more GPU improvement.  Any good links?

DX12 is more of a CPU cost reduction than a GPU improvement from what I could tell.