Despite suffering technical glitches that prompted jokes and guffaws, Bill Gates promised Wednesday that Microsoft Corp. would help millions of consumers stay seamlessly plugged into a world of digital music, movies, video games and television shows. In his seventh annual keynote speech at the annual International Consumer Electronics Show, Microsoft's chairman explained that the proliferation of broadband Internet access and the falling price of data storage are compelling people to put music, photos, movies and other aspects of their life into a digital format. "We predicted at the beginning of this decade that this would be a decade where the...