The video from our 2012 Google I/O Developer Tools talk is available. You can view it here:
It shows some of the highlights of the tools improvements over the last year, as well as a sneak peek at some upcoming features. Note that the audio is missing for the first 10 seconds. Also, you may want to switch to HD video to be able to see the details in the demos.
(Direct YouTube link: http://www.youtube.com/watch?v=Erd2k6EKxCQ&feature=player_embedded)