i.e., just like you can take your phone number to any other phone company, or how banks in europe have to share info, you were able to take your game library with you to any other game distribution service?
Perhaps the same could be done for iOS/Android portability
Because otherwise they seem like just another walled garden.
It's not about the customer--none of them cares, except at that moment in time the customer forks over the cash for it.
Then players would move all their games from crap clients like Origin and Uplay to Steam.
Could be extended to a lot of services tbh : Music Libraries in Spotify Contacts in Facebook
One of the reasons I love GOG is Connect : got a game on Steam ? Now you have it on GOG too.
Assuming it would work both ways, I would consolidate, on Steam, all the games I currently have on Origin, Bethesda Launcher, Battle.Net Launcher, Epic Games Launcher, uPlay, Twitch Desktop App, a few I've forgotten, and whateverthefuck Rockstar's GTAV launcher is called.. Though that's probably not what you had in mind.