Sebastian Raymond, Associated Press
"Journey to the Center of the Earth" is part of the growing trend to create 3-D movies for theaters.

LAS VEGAS — 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.

"It is nothing less than the greatest innovation that has happened for all of us in the movie business since the advent of color 70 years ago," Katzenberg said in an address at ShoWest, a conference in Las Vegas where studios unveil clips and other details about upcoming movie lineups.

"Now it's our chance to deliver something that is far superior than anything that can be done in the home," he said.

Katzenberg then showed off a 3-D clip of his studio's March 2009 release "Monsters vs. Aliens," in which the U.S. military unleashes a barrage on an alien spaceship as the president fires a few rounds from a handgun, shouting "I'm a brave president!"

The presentation came after the announcement of a deal calling for the conversion of 10,000 more theater screens for the digital technology needed to accommodate 3-D.

Access Integrated Technologies Inc. said it had reached agreements with four studios — Disney, News Corp.'s 20th Century Fox, Viacom Inc.'s Paramount, and Universal Pictures, which is owned by General Electric Co.'s NBC Universal — to finance and equip the screens in the United States and Canada during the next three years.

The conversion will cost as much as $700 million, said Bud Mayo, chief executive of Access Integrated Technologies, which completed a first tranche of 3,700 digital conversions in October.

Hollywood is anxious to convert as many theaters as possible to the digital format, which provides sharper images while eliminating the need for expensive celluloid film.

The digital technology can also be used to show 3-D movies with the addition of software and hardware costing about $25,000 per year for each screen.

"Hannah Montana & Miley Cyrus: Best of Both Worlds Concert," a 3-D movie, pulled in $31.3 million in its opening weekend last month, an impressive feat because it played on only 683 screens. Many wide-release, 2-D films open on more than 3,000 screens and make half as much money.

"We were in as many locations as we could possibly get," said Chuck Viane, president of distribution for Walt Disney Studios Motion Pictures. "If there were 3,000 3-D screens available, would we have played them all? Yeah, I think we would."

"Chicken Little," the first-ever animated 3-D movie released in November 2005, made $23,864 per screen, compared with $10,949 for the 2-D version.

Box office figures have shown that the enveloping feel of 3-D can attract two to three times more moviegoers who are willing to pay as much as $3 more per ticket, Stifel Nicolaus analyst Drew Crum said.

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."

Theaters owners and studios hope the offerings will help bring people back to multiplexes for an experience that cannot be matched by increasingly sophisticated home theater systems.

The theater industry is also battling competition from video games and other alternative entertainment along with Internet movie downloads.

The push to convert screens had been bogged down by a number of issues, including the shaky credit market that has threatened to increase costs even further. Thus far, only about 4,600 of the estimated 38,000 screens in the United States and Canada have been outfitted with digital technology. Only about 1,040 of those screens are now outfitted to show 3-D movies.

Interest in 3-D has come and gone since the 1950s, but studios began to take the format seriously again after a 3-D version of 2004's "The Polar Express" from Warner Bros. grossed more than $45 million.

A number of high-profile filmmakers now have 3-D projects in the works, including James Cameron and Tim Burton.

Meanwhile, theater chains are ponying up as much as $25,000 a year per screen to technology firm REAL D for the software, physical upgrades and maintenance that makes it possible to show 3-D movies.