Decided to post in this thread if anyone is scared that Google+ has disappeared. I have received an update to my search page and the black product bar at the top is gone. Here are some shots for your viewing pleasure. I'm not seeing this as affecting the SERP's so it must be just another tweak.
I started seeing this as well but for me it comes and goes. I'll log into my account in the morning and the traditional black bar will be there. I'll log out and then later in the day I'll have the new square icon in the corner. It literally changes throughout the day for me (as I log in and log out). Google must be pushing an update and it hasn't fully rolled out.
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