I think a better question (albeit a much larger topic) is how mobile technologies are changing the way we interact with each other which in turn is changing how we listen to music. More specifically it is changing the role of music. People are becoming more insular. The notion that the world is becoming smaller (which really became popular around the turn of the 19th/20th centuries) infers that people are getting to know each other (like a bad commercial for deoderant soap - a shrinking room full of people) Funny, but just the opposite is happening. People would rather send a text message that call on their phone, or would rather have a conference call than meet for lunch. Person-to-person interaction is reserved for power lunches and special family gatherings. Likewise, listening to music on mobile devices is a way for the listener to cut themselves off from the world - to create a personal soundtrack.