Music that hasn't yet happened

In this interview with the Guardian, Brian Eno explains the process of creating and naming "ambient" music. It reminds me a great deal of what many writers say about why they write:

My interest in making music has been to create something that does not exist that I would like to listen to, not because I wanted a job as a musician. I wanted to hear music that had not yet happened, by putting together things that suggested a new thing which did not yet exist. It's like having a ready-made...