Do you remember the concept of tablet Sony Xperia P? This tablet incorporated two screens can be closed like a book. NEC and NTT DoCoMo recently presented the Nec Medias W: an Android smartphone with two screens.
When this smartphone is folded, the Media W looks like a classic sights. Nevertheless its "thickness" hides a second screen. Once unfolded, the NEC Medias W can be used as a small tablet - like a Nintendo 3DS. You can run two applications simultaneously on both screens, to read your e-mails while navigating the browser instance.
This smartphone will come out as atypical NTT DoCoMo in Japan. Side "characteristics", do not expect surprises: a dual-core architecture clocked at 1.5 Ghz, 1 GB of RAM and a sensor Photo 8 megapixels. All with a screen that reaches 4.3 inches with a definition of 540 × 964.
Once the screen is unfolded, you have a mini tablet with a 5.6 inch screen with a light strip in the middle between the two screens. What you gain in screen size, you lose thickness as the product rises to 12.2 mm thick.