Asus Taichi 31 is first true ultrabook that sports 2x 13.3 inch IPS panels. As it has 2 screens, it allows the user to use it as tablet when the lid is closed. Thus, there is no need for a rotating hinge. The Taichi 31 features about 7 ours of continuous runtime on a single charge, which pretty amazing for a laptop with 2 screens.
Asus Taichi 31 specs
* 13.3 inch 2x screens
* 1920 x 1080 pixel resolution on both screens
* Core i5 / i7 processor
* 256GB SSD
* 4GB RAM
* 720p webcam
* Wi-Fi, Bluetooth 4.0, WiDi and 2x USB 3.0
* 7 hours battery life
Asus Taichi 31 retails for 1500 dollars in US.