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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.