I am generally not in favor of adding regulation, but this is a place where I would support it.
Anything that you BUY needs to be your property. This means you must have the ability to:
1. Transfer ownership of it (either temporarily as a loan or permanently as a sale). Digital-only doesn't preclude this: the store can have a "transfer" functionality.
2. (Within reason) use it at your discretion at any point after the sale. This means that a company cannot "revoke" your access at a later time. Specifically for content that is DRM locked, if they decide to sunset that service (store, DRM server, whatever), no problem! just offer DRM free (or generally lock-free copies). I have no problem with Sony not offering DRM free versions of games that I can still download and play with the store. But if that goes away -> you must give me a path to local ownership.
(Multiplayer games that require server infrastructure are a bit more complex, and I'd leave aside for now).
This should apply equally to video games, movies, books, music. Any digital content.
> I have no problem with Sony not offering DRM free versions of games that I can still download and play with the store. But if that goes away -> you must give me a path to local ownership.
I worry about shenanigans where you "buy" the game from a shell company and that shell company "folds" and doesn't uphold it's promises. Same is true for a smaller, but not shell, company. If the non-DRM version isn't already created and held in trust, then it's not trustworthy.
I don't see this as "regulation". I see this as extending the same consumer protections that existed in the era of analog physical media to the digital age.
All they have to do then is say that they license you a game, and you're not buying anything, despite paying for it. They already do that with online games.