Gaming development iterates and moves a lot faster than general desktop integration development, so this makes sense. Honestly the slowness is just because all the projects involved need more people and bandwidth at the QA and approval levels. There's a YON of activity in the projects downstream, but everything is backed up in reviews. I'm kind of glad a Valve adjacent project is pushing this, otherwise there would be a lot of fragmentation to do this in various other ways. The downside of course is getting developers in certain studios to actually work through this instead of just going for Windows support.