It means that Google is giving Blogger blog owners the possibility to use Google+ for the community of commenters around the blog.
It means that Blogger blog owners (such as myself) should look into embracing Google+ and exploiting every new feature Google provides us with.
They made the announcement today on the Blogger Buzz blog http://buzz.blogger.com/2013/09/automatically-share-your-blog-posts-to.html
With the right settings in your blogger blog you now have this choice in the settings dashboard:
It links over to a help page that explains everything. The basic idea is that you first connect your Blogger blog to a Google+ page, then you can configure the blog to autopost to that page by checking the button shown here.
Cool. Thank you Google.