This version has new themes. I'm happy to see an end to the weird fuzzy mushy looking buttons. I don't really like the other theme that I could find pictures of (Dark Audacity), but making it themeable is a big win. I might even tackle making a theme myself, as I use Audacity pretty regularly for the final mastering pass of tracks I make in FL Studio or Renoise or REAPER. It's a great tool but the UI has always been sad.