I once believed in what you're saying, but again, what are their recent efforts to accomplish such a thing? (other than Scorpio annoucement)
Cause if they want to progressively unify Xbox and Windows 10 they're not doing much for it lately. Windows 10 store is still quite messy, prices are not atractive, UWP doesn't allow nearly the same freedom Steam, Origin, GoG, or any other PC platform may offer to edit the game files / configurations.
If they want to make Xbox a "steam machine"-like product they're gonna need to create stronger appeal for it. They are not gathering PC players attention with their releases in the digital store, they're scaring people away from Xbox closing so many studios, canceling so many projects and not showing new IP's.
Maybe they're gonna soon announce something big, something that means a complete change in the way they're trying to achieve things, like a new project or something. But the way things have lately been directed is only deviating people from their projects.
I stated that they are working at building out that platform. Yes, the short comings of how they are doing on PC have been enumerated. I stated what their plan is...not how it is doing. I'm not telling you to believe in what I'm saying...meaning it will be successful, just stating what it seems to me what their plan is.