Google is demoing the new AdWords design today at 9:00am PT / 12:00pm ET. It will be live streamed from the Google Performance Summit.
This will be your first chance to see the new design in action, since Google announced it back in March of this year.
You need to sign up to watch the live stream at this page.
The new AdWords design is something Google plans on releasing a year out or so, so there is time. But Google wanted to give everyone a preview of what they are working on. They also shared this additional screen shot as a tease.
Update: You can watch the live stream here: