No way is gamepass coming to PlayStation or Nintendo. Its absurd people think that. The whole point of these consoles is to sell software, thats what makes the most profit. You think Sony or Nintendo would allow Microsoft to come and essentially sell the same software on their consoles? Who in their right mind think that would ever happen?
Hell, the whole reason playstation was created was over a similar dispute, when sony wanted the royalties of every CD sale sold on the then Nintendo consoles. Gamepass can exist on smart TVs, mobiles, laptops, tablets because they are open systems. Its Sony losing billions right there and gaining nothing, when all they have to do is offer a similar service, which they already do, with PS now.