+Blogger as we know it is changing by the day, and that is because Google, their Oga at the top, is becoming more and more interested in going social. To boost Google Adsense in 2009, they integrated it with blogger, and some insist that sounded the death knell for blogging. I'm not sure it's a bad thing, it's very useful for me, just like this new development may be.The want G+ comments, which will work a bit like Facebook comments, to replace Blogger comments.
After experimenting with Google Wave and Google Buzz, Google+ is now the de facto social site for all things Google, and it's not surprising they want to integrate it with Blogger, another of their strong social platforms. First it was the G+ sharing buttons, then the G+ circles (which killed Friend Connect BTW), and the G+ authorship that boosts your blog's search rankings.
According to the email I received,
Once you enable Google+ Comments, people can share the comments they make on your blog to their circles in Google+, helping you reach people that they know. And there's more: mentions of your posts on Google+ automatically show up right in your blog's comments, so you can see more of people’s public conversations about your content (and private conversations you’re part of).