Also they need to improve the quality of the samples vs itunes. When you buy a rock song, there is usually is only one recording of that song. But if you buy classical music there will be many recordings with very different qualities. With the quality of the samples available now, it's almost impossible to tell if a recoding will be of a good quality or not. Itunes has much better quality.
I mean, audio players could do that in the 90s.