I wish every TV had GamePass. The more locations, the merrier. I’m currently selling my Series S because I have a dedicated crap PC that can play Xcloud fantastic.

Yeah I think it would take some effort to get that store working on the deck... That UWP approach doesn't get work with Wine/proton afaik. I would think MS would be torn on officially supporting this. GamePass everywhere vs. Windows everywhere

I can play xcloud through the edge browser on my deck. it works pretty good too but I can see how a dedicated app would do away with the extra hoops to jump through. Im sure MS doesnt have a problem seeing as they were the ones to even come up with the 'how-to' to get it running on the deck in the first place.

If there is to be a gamepass app, it would have to be one that links your steam account to your microsoft account in order to validate and let you download the games that are on gamepass through steam.

I think your logic makes sense for a closed platform, but Steam Deck is amazingly open. They don't try to stop you from doing whatever you want. I have Epic, Ubi, and EA launchers on mine. It's one of the best things about Steam Deck. You can even drop into a Linux UI and use it like a normal computer

Unless they form a partnership. Advertise Gamepass optimized with Steam deck and get a kickback from MS based on userbase.