The Google IO 2013 Keynote was awesome. It was really cool to see Larry Page answer some questions from the audience. I really think that is an important thing that should be done more often to encourage the interchange of thoughts and ideas.
I feel that the new Flat UI has a much better User Experience then anything I have ever seen. Everything is really straight forward and simple. Everything is there for the user to see. No weird buttons or or custom crap.