If you haven't heard of Mirasol, it is a display technology developed by Qualcomm that uses the same principle used in nature to provide the color in a butterfly's wings.
The Marisol technology works like eInk in that once an image is displayed there is very little in terms of power that is needed to keep that image displayed. It is also a reflective technology, just like eInk. However, unlike eInk, Marisol provides colored images, where the color is very good and can be refreshed at speeds that easily support video.
Gizmodo has a nice video that showcases the technology, and I just came across
this article by Popular Mechanics that explains how the technology works.