My fantasy is that PC games become similar to roms, where it's a single file. Maybe encoded is the system specs, OS, etc.
Then the "emulator" just works.
Of course, no financial incentives and a lot of work just to exist. Not to mention, it'll be impossible to do for modern games. But maybe every game that's older than 10 years old gets this treatment.
Also I'm not a OS engineer and maybe this is what Proton is doing with Linux.
Then pure decentralized gaming on any OS - computer, browser, raspberry pi, "smart Fridge", whatever has the specs. And the game just works.
The idea is for games to be launcher independent/compatible with many launchers. If I wanna play a game I got on gog I could use the official launcher, heroic, mini galaxy, or I could even use no launcher and just download the game installers directly
And how would a launcher identify you've actually purchased the game? You still need a central source for that. Hypothetically I guess there could be an activitypub like protocol that all storefronts could use to sync purchases, but that opens up a whole other can of worms, such as account linking, purchase duplications, refunds. The main questions with this hypothetical are
Why would stores implement this when they don't really benefit from it?
Why would the users want it when it means creating more accounts and linking them? Why not just stick to one platform that best covers your needs? I guess there would be the "what if Valve turns bad?" argument, but company turning bad is at best a once in a decade situation. If that's the only reason then the feature won't be used 99.99% of the time.
There's also a question of who pays for the data? Games are huge and the cost of keeping storing them is factored into the price of the game. However, if you buy from store A and download in store B how is store B supposed to stay afloat when they only eat the cost of storing the game.
As for going completely launcherless, how do you solve updating the game? Steam was originally made to solve the patching problem, because each patch would effectively shut the entire game community down while everyone waited for everyone else to patch their game.
I think people just prefer Steam to Epic or EA's store fronts. Whenever GoG gets brought up, the only major complaint is is that there's no official Linux launcher, even when there are Linux binaries for the games.
It's not very good, but does the job. I mainly used the Mac version before jumping ship entirely. I was surprised that they made a Mac version, but no lINUX version. If you ever wanted to know true pain though, the Mac version of the Epic launch was true trash. Nothing worth playing on that anyway though since they discontinued Unreal Tournament.
Heroic launch has been pretty good for any of the modern games I've tried it it. Eventually, I want to get some of the old Star Wars games running though.