I don't think Nintendo would allow it. They don't even have fucking voice chat for safety reasons. The real play, as I said above, is Smart tvs in the late 2020s. They should be ubiquitous then, hate them though I might, and can pass Gamepass through with little negotiation.
I think that in their next gen, with Switch 2, Nintendo may reach the level of PS3 and 360: discover the achievements, proper online to have decent online multiplayer, voice chat and game subs. Who knows, maybe even cloud gaming or VR!
If horsepower is good enough to feature PS4-level games they may get 3rd party ports of AAA PS4 gen games, and companies like Ubi or EA would ask them to put there their subs, and MS could try it too.
I think it's pretty difficult, almost impossible -specifically in the case of MS before they leave Xbox as platform holder-. But still possible. Maybe not for Switch 2, but maybe for Switch 3.
I think in the late 2020s we'll be in a place where high end smartphones/tablets, consoles, PCs may have relatively similar hardware, game engines and stores, specially if regulators force Apple and Google (and who knows if PS and Nintendo) to allow other stores. This will ease multiplatform development, seeing more games everywhere. Something strengthened by PC handhelds gettting way more relevant and cloud gaming also being way more relevant as 5G and fiber internet coverage and cloud gaming tech keeps improving.
In that context, I think we'll see multiplatform stores from Sony, Nintendo, Microsoft and so on: you'll be able to buy a game and play it on console, PC, mobile, smart tv or whatever. In some places natively and in other ones via cloud gaming.