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On a large display though, you'll also see there's a large white space between the update stream and your IM/VoIP/video-conference panel. Something, we don't know what yet, is going to go there. Video? Your choice of gadgets ala iGoogle, we don't know.
Of course, it could be for sticky notes... You can also see though that on your Home page, you'll now see a trending on Google Plus display, shades of Twitter's trending feature.
Google has also made Google Plus a lot more graphics friendly. How friendly? It now includes a basic photo editor in its goodie bag. That shot, by the by, is of me in the press box at Boston's Fenway Park.