http://www.techradar.com/news/it-just-got-easier-to-combine-your-amazon-itunes-and-google-play-movie-library

Buying movies through different services just got a lot less complicated thanks to a new 'Movies Anywhere' initiative that combines your splintered film library.

This means you'll now have access to a single library of movies if you buy them (or bought them in the past) through Google Play, Amazon, iTunes and Vudu.