Amazing feature of Google+ mobile app

I'm not sure if this was widely known and I missed it. Nor do I know if it was just introduced with the latest update, or if it had been around for ages and I didn't realise. Just discovered earlier via Google+ that on the mobile app if you search pictures it brings up results like this:

Xvo3csj_medium

via i.imgur.com


U65js6a_medium

via i.imgur.com

These images aren't tagged or named, just auto-uploaded from my phone. Pretty awesome right? Google+ just gets better and better!