Over the past hundred years, film is by far the most significant form of art.  As a new medium, this probably goes without saying.  It is also true when considering artistic achievement within the realm of commerce or entertainment.  Movies re-established a balance that hasn't been true in music since what we call "classical" today was actually "pop" for its time.  Like music, films of all kinds have created a language of cinema that we rely upon more than we really know.

Different Drummer: Stanley Kauffmann