I read that as disputing the exclusive ability of any specific performer to make people's lives enjoyable, while all others will not be able to do so.
Before Gaga, people were paying for Madonna. After Gaga, people will be breathlessly excited and pay for someone else. If there was no Gaga, people would be breathlessly excited and pay for someone else yet.
That's exactly what I meant. I love music. I just don't think "people are breathlessly excited about X" means "X is valuable". A lot of people are excited about reality TV.
Before Gaga, people were paying for Madonna. After Gaga, people will be breathlessly excited and pay for someone else. If there was no Gaga, people would be breathlessly excited and pay for someone else yet.