Why are people excited for this? Cause it's easier to pirate?
No, because it means I can just move a game to another drive, double-click the .exe and it will launch. And with all the files (including games) I want stored and backed-up, even if GOG fuck up and go bankrupt, I will have a working game.
Plus, yes, should GOG go bankrupt and not offer customers the games they have bought to download, someone somewhere will have a DRM-free version from there to get a copy of should I not have my own.