Most popular e-readers
available today tend to be based around a 6-inch screen. Though you can
read technical manuals, textbooks (with graphics and tables), comic strips or electronic magazines on these devices, the roughly paperback-sized display does tend to feel just a little cramped. The Kno double-screened digital textbook
offered hope of bigger display real estate a few years back, but dedicated hardware was abandoned in favor of a multi-device app. Together with E Ink Holdings, Sony has developed a new flexible electronic paper display technology called Mobius, that will make its debut in a new 13.3-inch Reader prototype at EDIX 2013 in Tokyo between May 15 and 17.