A conversation for another day and I can't wait to have it, but something about this seems seriously doomed, because Steam already owns this lane, owns it well, and these days I think Linux is objectively the better desktop for most personal, PC-style use cases.

Windows stopped feeling like it meant PC a long time ago, and there's a major risk of the whole Xbox identity disappearing into the PC computing. Probably a conversation for another day but when everything is an Xbox, nothing is an Xbox, and when an Xbox is a PC it might as well be fading away Marty McFly style from our plane of existence.

I suppose what would really impress me is a Roku-style omnivore approach that gives a first class console-style experience and interface to Epic, Steam, Itch.io, GOG and of course Xbox.

You can run steam in big picture mode, and there are ways to add links to games from other game stores to steam such as https://github.com/PhilipK/BoilR

It's not automatic or perfect but it does work.