NEWS?ORTUS TECHNOLOGY CO., LTD. (http://www.ortustech.co.jp/english/news/20101026.html)

It's a 4.8 inch diagonal on a rectangle. Screen is too small. 3.84" × 2.88" (9.75cm × 7.32cm)

They claim that it is 1920 x 1080 and 448ppi. That's impossible. Assuming it has square pixels, it cannot be more than 266 ppi and 1024 x 768.

John