HANNOVER: In 1980, the aspiring global media baron Rupert Murdoch turned to the president of his U.S. newspaper operations, Donald Kummerfeld, and, as he was wont to do, made a bold prediction. "Someday, Don," Murdoch said, according to Kummerfeld, "all news — and advertising — will be delivered digitally. There will really be no need for paper and ink." More than a quarter of a century later, the...