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The old, 2012 Google+
This is what Google+ used to look like. A perfectly ordinary social network page, and though you can't tell it from this image, on a big enough screen it had lots of wasted white space.
The new, 2013 Google+
And, this is the new Google+. It has two to three content columns, and an optional video/VoIP/instant messaging column on the right. If it reminds some of you of Pinterest or WebOS, that shouldn't be a surprise. The Pinterest look is clear and Google+ designers now include some of the old WebOS team.
Google+ integrated photography
Google+ is now integrating your images even more closely into the system. Besides just collecting all your Google online photos into one interface, it also now includes automatic image fixig tools. With this move, Google is putting Facebook and Instragram on notice that they're playing in the photography space as well.