Back when Kindle launched, it was very common to see the story of Kodak being floated around (film vs digital) to claim how Amazon is flexible. Fast forward a few years, Amazon video and music services are the worst in terms of cross platform support.
The primary reason I don't buy/rent anything from Amazon Digital is because I can't stream it to my Chromecast. Considering the adoption for Chromecast I would have expected Amazon to support. Instead they ban it from Amazon.com.