Firstly... we are presuming that Music and movies are in the same medium as they are today. That would probably not be correct in the future.
Movies today are becoming more interactive, 3-d all the time.
A software movie could be completely immersive using Holo-tainment (another ingame commodity)
Music as well, music could be adjusted (imagine that you don't like a certain song being sung by a woman, you could change it to a man, or a group... or change lyrics to be more specific... interactive music... the possibilities are astounding)
All of these applications could well fit with "software"
even books are moving towards digital. If you combine this, with the old choose your own adventure stories of the late eighties, again you have a 'software' situation.
The medium is the mode... and the mode that seems popular at the moment in Freelancer appears to be computer based.
Who knows, maybe they will move full circle and embrace the wonder of vinyl... or the long neglected, but still wondrous 8-track.