3D movies account for nearly 20% of US box office revenues so far in 2010

"The movie industry welcomes Katzenberg's evangelizing because it badly needs those extra revenues. DVD sales have shrunk 19% since 2006. 3D is beginning to slowly make up for that loss, constituting nearly 20% of the $8 billion in box office revenues so far this year, up from 11% in 2009, according to Screen Digest. The production cost of a 3D movie is 10% to 20% higher than that of a regular film. But it could pay off. Jackass 3 (in 3D) earned 40% more in its opening weekend than Jackass 2."
Source:  Jeffrey Katzenberg of Dreamworks, reported by CTV, 31st October 2010