Earlier in the day he spoke at length to Meigs, where they discussed his early sci-fi influences, the importance of 2001: A Space Odyssey, why filmmakers should embrace technology, deep-sea exploration and the real-world influences on Avatar:
Here is the subsequent audience Q&A where he discusses higher frame rates, how the US can get its innovative edge back, the presentation of scientists on film and the experience of 3D in cinemas and the home.
> Popular Mechanics Archives
> Q&A print interview at Popular Mechanics
> Lengthy 2009 video interview where Cameron talks about the visual effects of Avatar
> More on James Cameron at Wikipedia
> Voice Cameos of James Cameron