Google Play reviews integrate your Google+ profile
As of now, all reviews that had been posted before this update will be marked as written by "A Google User", while any new reviews will show your Google+ profile name (theoretically your real name), and your profile picture.
We're fully on board with this idea, because while anonymity has its uses on the Internet, it is our belief that reviews and comment threads should be tied to real names. People should learn to defend what they say, take responsibility for it, and accept consequences for words, not hide behind pseudonyms that foster trolls.
source: Droid Life