Chances are, the money you thought you might make on your art will not materialize. Napster users wouldn't bother to listen to or download. Local hipsters perform on all the new equipment. Name artists show up to endorse certain product lines. Everyone tries to prognosticate the coming trends.
Music retailers try to predict what to order for their showrooms and music stores.
And many more. You'll be able to download all kinds of content and play it back anywhere. Yes, for a few years, but not forever. They will eventually gather dust alongside your eight-tracks and 78s. Not a chance.