“I’m dying of Boredom,” complains the young wife, Yelena, in Chekhov’s 1897 play Uncle Vanya. “I don’t know what to do.” Of course, if Yelena were around today, we know how she’d alleviate her boredom: She’d pull out her smartphone and find something diverting, like BuzzFeed or Twitter or Clash of Clans. If you have a planet’s worth of entertainment in your pocket, it’s easy to stave off ennui.