The fluid and fleeting symbols on a screen pull us away from the classical notions of monumental authors and authority. On the screen, the subjective again trumps the objective. The past is a rush of data streams cut and rearranged into a new mashup, while truth is something you assemble yourself on your own screen as you jump from link to link. We are now in the middle of a second Gutenberg shift -- from book fluency to screen fluency, from literacy to visuality.

The overthrow of the book would have happened long ago but for the great user asymmetry inherent in all media. It is easier to read a book than to write one; easier to listen to a song than to compose one; easier to attend a play than to produce one. But movies in particular suffer from this user asymmetry. The intensely collaborative work needed to coddle chemically treated film and paste together its strips into movies meant that it was vastly easier to watch a movie than to make one. A Hollywood blockbuster can take a million person-hours to produce and only two hours to consume. But now, cheap and universal tools of creation (megapixel phone cameras, Photoshop, iMovie) are quickly reducing the effort needed to create moving images. To the utter bafflement of the experts who confidently claimed that viewers would never rise from their reclining passivity, tens of millions of people have in recent years spent uncountable hours making movies of their own design. Having a ready and reachable audience of potential millions helps, as does the choice of multiple modes in which to create. Because of new consumer gadgets, community training, peer encouragement and fiendishly clever software, the ease of making video now approaches the ease of writing.