So many words to suggest I don't understand the situation or I'm old fashioned. We can see the situation just fine. We still need these amazing business plans to be proven on how exactly MS will grow their gaming services and so far nothing about Play Anywhere is enticing the PC side besides the Xbox exclusives they can't get otherwise.That's a shortsighted view of things. You are looking at the landscape as it exists and how you have an understanding of it traditionally. While Game Pass is really for Xbox One console now, it won't always be. That's why they are making more Play Anywhere titles (and encouraging others to do so as well).
360 and Xbox One games running on the PC is a very limited library with so many of those games already on PC. Where's all this demand for the 360 and XB1 library on the PC anyway? We already got all Xbox exclusives going forward on PC.That's why they are investing in making BC on PC for OG/360 and prolly XBO games at some point. Then with Phil stating (and it being obvious) that they will have a Game Streaming service (as Sony does) but with Game Pass where you wouldn't need neither a PC nor a console, you can see how much it "console sales" matter in the big scheme of things.
Then you say streaming services with Game Pass will help nullify console sales, but we haven't seen this work so far. Sony used to let you game on Samsung TVs without a PC or console, but they have since discontinued it, maybe because Samsung wasn't getting anything out of the deal or it just wasn't popular. Either way it suggests so far this isn't going to be an automatic success like you make it sound.
We'll have to see, but so far these ideas have been tried in some ways and don't guarantee MS has a solid solution to growth in gaming profits outside of consoles.