This week, Avatar and Terminator 2: Judgment Day director James Cameron invited specialist press to a special 15-minute demo screening of his latest project, Titanic 3D. Cameron, who has been an advocate of the move to 3D ever since Pandora was but a whisper of an idea, follows Pixar (the Toy Story trilogy) and Disney (The Lion King 3D) in bringing the 3D treatment to his 1997 box-office juggernaut.