When Disney launched its Movies Anywhere app early last year it could only plug digital copies into your iTunes account, but today it linked up with Amazon Instant Video and Microsoft Video. Besides new Disney apps for Xbox 360 and Amazon's Fire TV platform, next week on the 15th it's launching on Roku and Android TV. That means any movie you've unlocked with Disney (like Big Hero 6, Guardians of the Galaxy or Avengers: Age of Ultron) is viewable through any of those services, as well as Google Play and Vudu. Once you connect them to your account, buying a copy on one service unlocks the movie on others, as powered by Disney's KeyChest setup. More importantly, Amazon and Microsoft don't support Ultraviolet digital copies, which may swing the balance of power just as Ultra HD Blu-ray arrives on the scene. Wherever you stream your movies, linking your accounts may be worthwhile since Disney will toss a free copy of Monsters Inc. into your account for doing so.