Why would it? That's a functionality that can't be used without Microsoft proprietary parts. Unless I missed something, I don't think there is an open source implementation of DirectX somewhere?
I doubt the linux devs ever see WLS as a target they have to maintain themselves.
Ok, not my field, but isn't it based on OpenGL? Does it count as an implementation or an emulation layer? My understanding is that Microsoft is trying to give WSL a transparent access to the GPU using the regular linux interface and transmitting it to DirectX.
Using that with wine would mean adding two emulation layers before reaching the actual driver. I fail to see any use case for that.
It's based on vulkan, which means that it has low enough level access to the GPU that I think it's fair to call libraries implemented on top of it "native". Most GPU drivers have some kind of translation for directx already, and there's no inherent reason why the open source directx implementation has to perform worse than the GPU implementation of directx. I hear that the open source dx11 implementation actually beats AMD's DX11 implementation in some cases.
So yeah, vulkan is neat and opens up a whole lot for the linux world. In the future you'll probably see userspace implementations of opengl on top of vulkan, maybe even CUDA implemented on AMD gpus, although I'm not sure how practical that is. Also a whole lot of exciting GPU sharing tech, accessing GPUs inside of VMs for example.
DirectX will come to linux, but it won't be thanks to microsoft. You can thank valve hedging their bets on the microsoft store for that.
I doubt the linux devs ever see WLS as a target they have to maintain themselves.