Correct. That screen utilizes eInk (ePaper, whatever currently the hype word is for it). The main idea behind this technology is readability and minimal energy consumption. Next generation of this technology will probably be OLED (Organic Light Emitting Diode) with which it will be possible to have thin and colorful displays. Sony has developed interesting prototypes which you can see e.g. here. (http://jp.youtube.com/watch?v=NcAm3KihFho)