Find out about the new features after the break.
According to the official Google blog post, "Contacts now works more like the rest of Gmail, so if you know how to use Gmail, now you should automatically feel comfortable in Contacts too." New features include keyboard shortcuts (for a full list, open Contacts and hit "?"), sorting by last name, automatic saving, and a larger and more prominent Notes field. Google also released slight tweaks to your Gmail inbox, making your contacts more accessible and easy to find.
I'm not an avid Contacts user so I don't know that I'll take advantage of all of these upgrades. What about you? Are you happy with Gmail's new look?