A new trailer for Rock Band 3, discovered on GameStop Italy's YouTube page, highlights many of the new and exciting features of Harmonix's upcoming sequel. You'll see the brand new Music Library, with more flexible sorting options. The trailer confirms the ability to import tracks from nearly every game in the franchise, including Lego Rock Band.
Most mesmerizing of all is the first direct-feed footage of the new "Pro" mode, which has you playing instruments like a real musician would. Is anyone else quivering at the sight of finger notations?
Update: The trailer has been removed from YouTube. We've replaced it with an embed from GameVideos.