And how does that prove that NVidia has not designed that together with Microsoft first in DirectX prototype?

Additionally, naturally Intel and AMD will come up with their extensions, if ever, followed by a Khronos common one. Not counting mobile units into this extension frenzy.

So then we will have the pleasure to chose between four extensions for a feature, depending on the card's vendor, with possible incompatible semantics, as it has happened so many times.