New rounds, new game modes, new contestants, new mini-quizzes, fully customisable, an expanded eight-player game and multiple local players in Sofa vs Sofa. We've also added a profile system which lets Buzz track how you're playing and abuse you by name. It's as unnerving as it sounds.
Yes, your existing quiz packs will work and yes, your MyBuzz! quizzes will work. It's all good.
At some point we'll give Quiz World a page on our site, but in the mean time here's a video and some screenshots. Video on YouTube here.