I mean that's everything. There isn't a "movie of the summer" anymore really, no I Love Lucy / Cheers / Friends / Simpsons that basically everyone is watching or familiar with. It's been true for longer with books/music because of the lower gateways to entry and being able to be a "local artist", but not by much, and even for them it's exploded since the Internet became mainstream.

The democratization of publication has dramatically broadened the type and quality of things being made and no industry titans really have figured out how to promote around that. At least not consistently.