Google has announced that Play Movies now support Dolby Digital Plus surround sound on Android TV and Roku. That's right, movies that you rent or purchase from Play Movies will now output a better sound, and allow you to take full advantage of your home theater system.
Play Movies now support @Dolby Digital Plus surround sound on Android TV & Roku!— Google Play (@GooglePlay) May 4, 2016
You don't need to do anything different to enable the support. Simply head to Play Movies, take your pick from the huge selection, and then play it on your Android TV or Roku hardware. Once you experience it, be sure to let us know what you thought of it, and if it made any noticeable difference on your set up.