Ok, so this is really cool. And no – you can’t watch porn on it… yet. More info here
Siemens researchers have developed a cell phone featuring a built-in projector system. A laboratory model was presented at CeBIT 2005 in Hanover. The system makes it possible to project a complete keypad or display onto a surface. With a special pen, users can write on the virtual keypad and operate the phone’s functions.

The Mobile Phone with built-in projector by Troy Kelly, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

