I love Amazon's X-Ray feature so I built a chrome extension on similar lines for Netflix, Netflix Lens. You can see the cast, music, and trivia of the movie/episode you're watching. Music can be played on the Netflix Screen itself.
Clicking on any of the actors brings up a collection of their other works, with titles available on Netflix highlighted with a flag that can be added to your Netflix watchlist from the lens view.
Clicking on any title will reveal information about that movie or series including trailers, ratings, cast, and descriptions.
I'm still developing it, so would love any feedback or suggestions. View in Chrome Store!