I’m confused by what you’re trying to say, the mirror universe first debuted in the original series, and this wasn’t an alternate universe episode it was an alternate timeline episode. So yeah it’s like the Doc and Marty who are definitely the same people despite the timeline changes in the second movie.
It’s more than that even, MS and Sony switched to an x86 platform for the consoles specifically to make it easier to develop cross-platform. Valve was very vocal about how hard The Orange Box was to port to the PS3 and that they wouldn’t develop for that platform again. This wasn’t a trend, it was a conscious choice and I genuinely don’t know what the goal was if not this. I was convinced that Xbox was going to become a Steam clone until recently anyway and I think the jury is still out on if MS will ever make another console themselves.
If the goal is to make it more exclusive then they should switch back to Power PC processors at least and offer other reasons to use a console over a PC.
You could maybe make an argument for Counter Strike or Team Fortress or something like that… maybe.
Fun Fact: MacOS is partially based on FreeBSD.