Google Hangouts for Android is now available for download with Material Design. After the first screenshots, now the update is rolling out. On official Google blog, there is also a post with all change logs for the updated Google Hangouts. There are made lot of changes also under the app core. Integration with Android Wear devices where now is more easy to send messages.
You can wait the update or download the Google Hangouts APK from APKMirror.
