Google have announced that Developers are getting the ability to reply to Google Play comments.
For now only Top Developers are getting the ability to do this which means that the systems are in place, however this is not a commitment for developers to actually reply to comments (aka, don’t expect a reply from Facebook for Android).
They say that depending on how well users respond to this, all developers should be able to soon. This is great news and hopefully at Google IO we’ll see more features.
Source: Android Developers