The XDC 2020 video: https://www.youtube.com/watch?v=b2mnbyRgXkY&feature=emb_logo
If you're interested in the lowlevel WDDM driver <-> VM driver mapping, seek to 1:18:01 -- it also talks about the compute APIs like CUDA and OpenCL.
If you're interested in WSLG, seek to 2:13:01 -- this is the GUI part of the story.