The latest update to the Google Play Music app for Android didn’t introduce any major features, but new code inside the app hints at a future one. There’s a string of code referencing an autoplay feature that will “Automatically start music when you open the app.”
There are also references to more quality control, like audio quality over WiFi and LTE rather than just one option for quality on a mobile network, as well as downloaded music quality to potentially save on storage. Unfortunately, there’s no knowing if these features will actually come to the app. For now, all we have are hints.