DreamWorks Animation SKG Inc. chief executive Jeffrey Katzenberg promised a “new era” in moviegoing Tuesday, as Hollywood studios prepared a huge slate of 3-D movies for theaters that are increasingly going digital.

About 1,040 theater screens are now outfitted to show 3-D movies; plans call for 10,000 more theater screens to be converted to the digital technology needed to accommodate 3-D.

At least 30 more 3-D movies are in the pipeline from Hollywood, including this summer’s adaptation of Jules Verne’s “Journey to the Center of the Earth.”