Back in June of 2012, Google started allowing developers with a “Top Developer Badge” to respond to Google Play app reviews, both the good and bad. Now it seems that Google is opening up the comments system to all developers.
Allowing developers to respond to their reviewers is important for a number of reasons. First, it gives developers a way of defending incorrect information spread about their apps. Secondly, it provides developers a way to provide additional troubleshooting information to their customers.
Often times, a would-be customer uses app reviews as a final deciding factor before downloading or purchasing an app, this is why having quality reviews and feedback is important.
Google already started addressing this issue in November by requiring users to sign in with a Google+ account in order to comment or place a review. Adding the ability for all developers to comment back is just taking things to the next level as far as quality control is concerned.
Keep in mind that not all developers have received the ability to comment back just yet. According to Google, the feature is gradually being expanded to additional Google Play developers. Google has yet to say how long this roll-out with take.