Orustech Japan has teamed with Casio and Toppan Printing to develop the worldís smallest 1080p display. It measures 4.8-inches diagonally and has a native resolution of 1920x1080 at an extremely high density of 458 pixels-per-inch (ppi). This is a much more densely packed display than the iPhone 4ís vaunted 3.5-inch Retina display, which has a 960x640 resolution at 326ppi.
