Who knew? First came emailing, then came music downloads and internet surfing on the mobile device. Now comes comics. Reuters reports today that in Japan, analysts expect the next big thing on the small screen to be superheroes, like Superman and Spiderman. In the last year, revenues in the “mobile publication market” doubled to 22 billion yen ($204 million) because of this phenomenon. At that size, it makes it almost three times larger than the e-publication market for PCs, according to Internet and media research firm Impress R&D. “Until now, users had been extensively using mobile phones for emails,” said Shinko Securities analyst Tomohiko Okugawa. “Now that’s shifting to games and comics…this are is going to be very interesting.” Analysts surmise the popularity of comics have come as phones in Japan have gotten bigger screens and higher-quality resolution to make them more enjoyable to read.