Google is trying everything in their power to make sure their loyal users do not forget about their social network. They are adding some more Google+ integration into Gmail. If a user emails you from a Gmail account, and they also have a Google+ account, you will be able to add them to your circles right from Gmail. This makes it easy to find people to add to your circles.
In addition to being able to add them to your circles, you will also see their latest status update on the right side of the email. It’s cool way of making email feel more social again. It seems like email has become such an in and out kind of thing nowadays. Adding something like this gives it a more personal feel.
They are also adding Google+ into their contacts application. Any users in your Google Contacts who make changes to their Google+ account will be reflected in Contacts.
The last feature change is that any pictures you send or receive in Gmail can be quickly shared in Google+. Instead of having only the option to download the pictures, you will be able to click on the share link and have it sent to your plus profile.
Google expects these features to roll out over the next couple of days.