No one knows more about shooting 3D than Avatar director James Cameron, right?
Whether or not that is true, Cameron has gone on record in saying that more 3D content is needed. He says that 2D to 3D conversion is not enough, that it takes takes too long.
In other words, it is time for filmmakers to start shooting in 3D from the get-go. Better get on it, if you want some content for all those 3D channels that are ready to come out.