Sony to file patent application for dual-screen, dual-use tablet. Described specifically as an "electronic book with enhanced features," the device would sport two screens that could take on a different functionality depending on how the device is oriented -- functioning as an e-reader when in portrait mode, and displaying a keyboard on the lower screen when placed on a table, for instance The concept is on the surface a dual-touchscreen e-book reader but would change functions as it's rotated. On its side, the device could turn into a notebook with a keyboard below and and content up top. The design could also have solar power on the outside and would fold up like a notebook.