Although iTunes music sales are still growing, it is coming from "the increasing average number of downloads per buyer." This means that once the CD generation gets older and we're left with the young kids today in their 20s, they may not be interested in using iTunes and spending money on music in this way.
The author of this article believes that if Apple can come up with a music product innovation by taking apps to a platform for sales, it will appeal to the youth more than putting songs on their iPod will. It's an interesting thought, and I'm sure we're heading for new innovations no matter what.
-- Ashley Snider