Lessig at TED: are we heading for a "read only" culture?

I saw Professor Lessig speak in Brisbane 2 years ago. He has a distinctive presentation style.

At TED this year he distilled his argument into an entertaining, but persuasive, 20 minute presentation on the nature of copyright, youth culture and technology. Do we want a "read only" culture (where use of original material is restricted) or a "read/write culture" (where original material can be adapted)?

Watch the video here.