>> Perhaps you mean the phenomenon of popular artists that are so big that they are household names across all demographics across the globe/nation. If so then your probably right. Probably we will see less new justin timberlakes/drakes/britney spears level superstars, and more local/regional/niche stars.

No, the big artists will only get bigger, because those are the artists that can afford to tour and have the backing of their labels. It'll just be harder for smaller acts to become bigger acts.