The latest revival of 3D may have turned out to be another flash in the pan. While a record 47 movies were released in 3D last year, revenue from 3D movies dropped 18 percent to $1.8 billion in 2011 versus $2.2 billion in 2010, according to figures released Thursday by the Motion Picture Association of America. Nevertheless, the conversion of theaters from film to digital continued apace. In a conference call on Thursday, John Fithian, CEO of The National Association of Theatre Owners, observed that 65 percent of all U.S. screens now employ digital projection while 50 percent of screens worldwide are digital. "This offers a wider footprint for showing movies in 3-D and greater versatility to show movies in diverse genres to more consumers," he said.