While it is busy developing expansion content for The Witcher 3, CD Projekt is indeed currently moving developers to work on its next title, Cyberpunk 2077.
CD Projekt Red's Cyberpunk 2077, has been put on hold so the studio can focus on developing more content for its wildly successful The Witcher 3: Wild Hunt.
Unlike in most role-playing games, killing monsters and animals outside of quests in The Witcher 3: The Wild Hunt won't earn your character experience.