I've made a small video to show the UI improvements for Drools and Guvnor. It's recorded in 1024x768, so it's slightly more cramped, people typically have their UI's open larger than that these days. Don't forget to turn on Youtube HD settings:
https://www.youtube.com/watch?v=ckAznbOOV-4
https://www.youtube.com/watch?v=ckAznbOOV-4