Today, Gmail hits the double digits. Over the last 10 years, you—our users—have been our biggest inspiration. You've sent us ideas for features you want, and told us what you like (and didn't like...). So while it may be our birthday, we want to say thank you to you with a gift that is, well, all about you.
But you can still go back to the old layout if you prefer.
Overall, this looks like a decent UI update for people that use multiple Google services.
Spam runs rampant on Gmail, but you have options.
This one looks pretty interesting then, the Pokemon Google maps joke :D