Ok, so for the Xbox ecosystem, it will just be Xbox PC games according to you.  So EA, Epic, Rockstar, Ubisoft publishers don't have games in Xbox PC store, does that mean Magnus won't be able to run games from those publishers?  So you are saying no Madden 27, EA FC 27, FortNite on Magnus?
Now, do you have a source for the fact that the "improper" console will NOT have games optimized/compiled for that fixed spec hardware? Or is that simply your conjecture?
		
		
	 
I said 'Magnus' is going to be just a PC running Windows, so will run Windows games. Like any PC running Windows, won't be limited to the ones of the MS store.
Like any other PC running Windows, will be able to run the PC games these publishers released for Windows in any PC store: Steam, Epic Store, EA Play, GoG, Xbox PC store, Ubisoft Connect so on.
Epic won't kill the PC version of Fornite, so will be playabele there. EA will continue releasing their sports games on PC, so will be playable there.
According to my theory, in the next gen the Xbox ecosystem will be limited to the Xbox PC app (+ its cloud gaming). This device won't be a console: will be a PC.
Like everything else in this thread it's just my personal theory out of my ass, just based on the several related announcements, hints or rumors. Even if I have many friends/former coworkers working in different MS owned studios, I have no insider info about their next gen plans.
But seeing the Xbox branded Asus Rog Ally and Meta Quest, MS allowing to include PC games bought in other stores in their Xbox PC app launcher, adding a Big-Picture like , Phil saying they'll make tweaks to Windows to adapt it to consolize PCs, Satya Nutella saying his stuff about multiplatform, MS replacing the Xbox branding for Microsoft Gaming in several places, the Xbox marketshare getting smaller and smaller every quarter and many other things make me think that.