By now we know that Google is no stranger to testing new cover photos sizes for Google+. Today a new version has arrived with the goal of displaying the full image (not just a preview) while displaying user/page info at the same time.
Googler Karthik Nagaraj announced the update on Google+ and also explained that the image that has the blurred effect is actually the cover photo that is simply re-purposed next to the main image. The final product makes for a very unique & modern look that also highlights profile/page info much better than the previous options.
Thanks to the new specs the cover photos now show in full, no clicking to see the rest of the photo. The cover photo sizes continue to be in the 16×9 aspect ratio with a maximum resolution of 2120px by 1192px. The change is now live for all users.