Sony is exhibiting a rollable OLED display at the SID 2010. The 4.1-inch rollable display is only 80 micrometer thin and offers a resolution of 121ppi and full color.
Below you can watch an impressive video of the Sony rollable display in action.
Now Sony just needs to integrate this display in a pen shaped smartphone and make the display touch sensitive.
Rollable displays are not new, but this one is in full color and OLED based.
Via the Sony Japan site.