Padfone is basically an Android smartphone comes with 4.3-inch display that packed with front- and rear-facing camera and could be docked inside a 10.1-inch Asus tablet.
The idea is to integrate a smartphone inside a smartphone for ease of synchronization, space saving and transformation of an ebook reader to a fully function tablet complete with WiFi and 3G communication feature. You will be able to read ebooks, watching videos as well as browsing the web in one combo functions device.
Asus also designed the tablet with a dual-function battery strong enough to supply enough power for both padfone and the tablet at the same time. No info on availability date and pricing yet.