There is a value to having competition. My guess that if it works out and Nvidia and AMD have it implemented on silicon, then they will push to have those features accessible through a Vulkan interface.

I love open standards as much as the next guy but for something like this where the utility is still an open question, I'd rather than some just makes an implementation for just their technology. The alternative is that your open standard is full of half baked experiments and trimming a standard is a huge pain.