If Obsidian gets bought, we might have to say goodbye to games like PoE and Tyranny and what ever else similiar they might have cooking up at the moment.
Rather than seeing Obsidian get another go at making yet another Fallout FPS through Bethesda's tainted core design, I think I'd be more in favor to seeing them do their own things.
Another thing completely if Obsidian is allowed to make a game in the image of the originals, but that's highly unlikely.