The notion of making music like water is appealing. People have freely distributed water in their kitchen; yet will pay a premium for water in a bottle. It has been argued both for and against that, this is where the music is heading, a model where it feels like free and can be bought in forms that are more expensive. Why do people by bottled water anyway? By the looks of it, however, the reasons that they do have little to do with the way music works. This talk is a compelling look at how bottled water is sold to us and the ways we have been convinced to fear tap water. Here's a look at why people buy bottled water:
The whole video is below, but the section I'm referring to is here.