This jet-setting, Davos-attending crowd constitutes its own superclass, who hang out at the same TED talks, big-idea conferences and fund-raising galas, appear on the same talk shows, invest in one another’s projects, wear one another’s brand apparel, champion one another’s causes, marry and cheat on one another. “The New Digital Age,” the new guide to the future by Eric Schmidt and Jared Cohen of Google, carries blurbs from such technology experts as Henry A. Kissinger and Tony Blair. The inevitable next step is for Kim Kardashian to sit on the board of a tech start-up, host a global-poverty-awareness event and write a book on behavioral neuroscience.

This new kind of celebrity is the ultimate costume ball, far more exclusive and decadent than even the most potent magnates of Hollywood’s studio era could have dreamed up. Their superficial diversity dangles before us the myth that in America, anything is possible — even as the American dream quietly dies, a victim of the calcification of a class system that is nearly hereditary.

As mindless diversions from a sluggish economy and chronic malaise, the new aristocrats play a useful role. But their advent suggests that, after decades of widening income gaps, unequal distributions of opportunity and reward, and corroding public institutions, we have gone back to Gatsby’s time — or something far more perverse. The celebrity monuments of our age have grown so huge that they dwarf the aspirations of ordinary people, who are asked to yield their dreams to the gods: to flash their favorite singer’s corporate logo at concerts, to pour open their lives (and data) on Facebook, to adopt Apple as a lifestyle. We know our stars aren’t inviting us to think we can be just like them. Their success is based on leaving the rest of us behind.