It's a twist on the which-newspaper-will-die game: Predicting which Web site will survive.
It is true that many upstarts are now middle-aged media and that the culling of the herd hasn't taken hold in quite the same way online as it has in legacy media in recent years --- even if the business model is challenged.
Vanity Fair has identified certain dinosaur-sounding species and selected the possible survivors and victims in the time ahead. Media Darwinism, it calls it.
