ref:
http://en.wikipedia.org/wiki/DirectX#DirectX_12
So if the above is true there will be no need to upgrade for many of us (not to get DX12 compatibility anyway). Let's hope it's supported in the drivers and applications soon.
Even a test demo to show it's potential would be nice. Direct X 12 contains many features similar to AMD's 'Mantle'. This means less overhead and more grunt for gaming...