From what I understand, you’ll still be owning your game on GOG the way you currently do, it’s mostly a new way to “consume” them. It does not feel like a regression to me, seems mostly to be opening to new possibilities.

I think you’re correct with the first sentence, but on the second, I somewhat disagree. Strictly speaking, it’s correct, yet it’s not so new insofar as other platforms have done similar sorts of things, and with GOG I’d have hoped they might look into partnering with some software developers working on enabling local/self-hosted game streaming solutions more in the spirit of the DRM free approach.