Considering Linux support has been pretty abysmal, any improvement would be nice. I still don't see OpenGL beating out DirectX any time soon. It has been behind DX for awhile and besides Valve, Blizzard, and id developers have really shied away from it.
You got so wrapped up in berating me you forgot your original point.
How much effort do you think Nvidia is putting into DX these days? Both AMD and Nvidia decided to ditch DirectX a while ago, they just went about it in different ways. OpenGL suited Nvidia because it was their key to breaking x86. Going all in with ARM was their play, and OpenGL was their way in to ARM.
If you understand this stuff at a deeper level you realise just how far behind Nvidia is regarding their own Mantle-type API. They didn't even consider it, let alone consider AMD would do something like this.
OpenGL was Nvidia's future in graphics. They did the only thing that made sense to them.