Siemens is showing off a paper-thin electrochromic display that they hope will eventually lead to an all-in-one device that uses printing technology to lay down the display, circuits and even the battery. According to the New Scientist:
The display is controlled by a printed circuit and can be powered by a very thin printable battery or a photovoltaic cell. The goal is to be able to create the entire device – the display and its power source – using the same printing method, so that manufacturing costs would be as low as possible. Siemens expects to achieve this by 2007.
Also impressive is that the display cost about £30 (just over $50) per square meter of materials.
Update 5pm: added link to Siemens announcement.