Google Says Game "Stream" Coming to Google+

We've heard rumblings that some form of, perhaps social, gaming was coming to Google+ but it hasn't really been verified officially until today. Found today under a description of the service's streams is this nugget: "If you're looking for updates shared from games, check out your Games stream." The link for Games Stream send browsers to a missing page. But it's coming, it seems.


All Your Base

Can anyone fill me in? What exactly is Google +?