As usual, Japan has it going on in the advanced concept phone department. This reconfigurable Fujitsu device was shown at CEATEC and allows the user to separate the screen and touchscreen keypad however they like. This comes from a research partnership between Fujitsu and Docomo.
Both parts can be used by themselves or joined together with magnets and used horizontally or vertically. What the touchscreen shows is determined by where you stick the screen on the keypad. The screen module houses all of the software functions, which includes video recording and games. The keyboard section is responsible for other tasks, like 3G and radio. Communication between both sections is done through Bluetooth. It would be nice to see this move from concept to reality, but who knows.