This creates a world of hyperreality where the distinctions between real and unreal are blurred. The culture industry blurs the lines between facts and information, between information and entertainment, between entertainment and politics. Because simulations and simulacra ultimately have no referents, the social begins to implode. Culture and society become a flux of undifferentiated images and signs. This process is analogous to Herbert Marcuse's notion of one-dimensionality.
Popular music provides a good example.
The categories and forms of music are forced onto the musicians by music corporation's categorical conventions. What begins as projecting a liberating function at the level of individual expression, gets turned into a repressive category. The actual musicians are turned into simulations on MTV which essentially snuff out their potential resistance to the dominant categories. They no longer have a specific historical context through which they arose. In this context, the art was created as an expression of resistance to the feeling of domination in urban life.