Inernet is not destroyed the music business
Greed, ripping people off and creating a commercial engine to churn out throwaway pop trash is killing the music industry (I'm finding the apparent implied definition of music industry being the economic value of the biggest labels interesting...).
Music industry will never die, its like nature, some animals who do not adapt to change will go extinct but others will flourish and evolve in their absence. There is great music being produced off the mainstream, its just not deemed worthy / profitable enough by the big labels.
Internet provides a wonderful access to music, the number of major artists that were recognised through myspace and youtube is enormus. It provides a mechanism where a pennyless artist can upload some tracks to a billion wide audience -- how can that be destroying the music industry?