The first thing you'll notice with the new Google Plus look is there's now a left hand Google Plus application ribbon. The idea is to make it easier for you to get to the parts of Google Plus you hang out the most in.
For more about the new Google Plus, read my blog.
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.
Google's circles interface, remains basically the same.
Google Games is a bit easier to use, but it also hasn't changed that much.
Google Explore strikes me as a mis-fire. A page just for seeing what's new and interesting on Google+? This doesn't do anything for me.
The notification panel on the right also has remained the same and that's fine by me. It's easy to see who's responded to your updates, who's added you to their Google+ circles, and so on.