Google contacts gets google+ integration : View your contacts phone, email, address, etc., details while viewing his/her google+ profile
Contacts (contacts.google.com) is the latest google product to get Google+ integration and so the social features. Watch your contacts details appear on in his/her G+ profile (of course it is private and only visible to you).
You signed up for Google+ and the first thing you want to do is create your Google+ profile. It serves as the front door and entry point for your Google+ account.