We're sorry to hear that this annoncement has caused confusion, so let me try to address some misunderstandings that I've seen in the comments.
Naturally GOG.COM remains a DRM-free Store... [*snip*]
There is also a handy FAQ
which might answer some other questions you have in mind. =)
My initial presumption given's GOG.com's famously anti-DRM stance was this initiative would only include a selection of DRM-free games from the Epic store (given the 'hand-picked' wording of GOG's announcement) and since the games shown off in screenshots are DRM-free. However the FAQ seems to be carefully phrased to avoid outright stating that games with DRM won't be sold via Galaxy's new feature, so it's no wonder there is community confusion and push-back.
Does it mean games with DRM will be sold in the new store in GOG GALAXY?
GOG GALAXY 2.0 was created as the app to organize all your games across multiple gaming platforms - no matter if these were DRM-free single player games or online-only MMOs. Similarly, the new store in GOG GALAXY welcomes all games from all platforms - including GOG.COM.
Also according to the FAQ games bought via Galaxy from Epic can be downloaded and installed via the Galaxy client, making the user-facing integration native in every way except for needing a separate account on Epic (GOG handling purchase, refunds, service, client, install).
This is a concerning route for GOG to take imo if it includes games with DRM, but regardless as one person pointed out it puts GOG in a less ideal position for obtaining games for their own service if publishers can reason to themselves that it's easier to put a game on Epic without having to worry about GOG.com, even if the game is DRM-free (however at least in those cases the consumer ends up with a DRM-free game, yet if GOG.com handles purchases of DRM'd games it becomes quite conflicting).