"I watched Godfather on Ultraflix. It was an incredible visual treat compared to the Bluray of the same. Significantly superior. Also had 5.1 surround. Only downside - no subtitles for the scenes where characters speak Italian !! I complained to their support team.
In fact, I don't think the app on my Samsung allows one to toggle subtitles."

--user from AVSforums.com

Build it, and they will come.