Well so far as the movie goes, it was just entertainment but probably poor entertainment to those that were well familiar with the wonder of his music and have explored his life in more detail trying to get a glimpse of how it could have come about. To the masses of moviegoers, Mozart was just a historical figure.
The great point of the movie to me is not the story, its the music and if it takes popular art to embellish and distort the story of Mozart the man, there can certainly be no distortion of the greatness of his music and the power of his creativity for a new generation to discover. So the film did have its value in that regard. I just never cease to be amazed when I listen whether it be his opera music, his great piano concertos, his variations on twinkle twinkle, is varied chamber works, when you hear the best of his music you know only he alone could have created it.