I don't believe, that the "music of the future" will be much different than the music of "today". The really worthy music will not vanish, so there can only be added some more, worthy compositions. The music history has shown, that indeed the best music survives, while uninteresting and mediocre compositions vanish in the archives. In 300 years there will be still played the great works of Bach, Beethoven, Schumann, Brahms, Stravinsky, Berio and some music, we can't imagine yet.Okay, perhaps pianistimo will contradict here - most of the great composers will roast in hell then
My classical radio station plays "Top 40 Classical Music." They do the same pieces over and over. You get really good at identifying a piece instantly though. All "soothing" classical music too.Anyway. I think technology will open things up. Making music with technology. More access. More ability to compose, but the results will be done by a computer, generating its own sounds that are unique or imitate real instruments. People who don't know how to read and write music can compose. More flexibility. More access. More ease. But I don't think the numbers of people will shift much. People will have access, but won't necessarily want to sit down and compose if they just want listening enjoyment.