Google Play Music has been updated to version 5.4 and it brings new offline capabilities to the service.
In addition to the offline features, users can now control the access permissions directly on the Google Play Music. Until now, you had to visit the dedicated website in order to change those settings. The Google Play Music is now also a bit more integrated with the new Chromecast device and they are no longer displayed twice, and brings additional options to All Inclusive subscribers of Google Play Music.
All in all, Google has made some quality changes to the Play Music. Unfortunately, the release of the new version also depends on the region, since Google has just begun to roll it out to Android devices.
Source:
Google