Watching movies on the big screen was once a mainstream, shared cultural experience. Think of the crowds that turned out for the Harry Potter movies or Titanic. Those days are gone. So wrote New York Times columnist Ross Douthat last month, and today we ask longtime film reviewers Derrick Bang and Matias Bombal what they think about this idea. Is the change due only to competition from other media, or is something else at work? What does it matter, regardless? Derrick, an author and frequent guest on Davisville, writes for the Davis Enterprise and his blog, Derrick Bang on Film. Matias posts reviews at Matias Bombal’s Hollywood and on KAHI radio, and formerly managed the Crest Movie Theatre in downtown Sacramento.