Amazon announced that it bought Samsung's Electrowetting display unit (formerly LiquaVista). The sum was undisclosed, but it probably was not a large sum (reportedly Samsung wanted to sell it for less than $100 million).
Compared to E Ink panels, Electrowetting displays can feature brighter color and much faster refresh rates, while still being very low on power. On the other hand the display technology hasn't been commercialized yet. Which makes the Amazon purchase a bit puzzling (after all Amazon is not a display maker and not an IP company). Perhaps Amazon hopes this kind of technology may enable them to build a unique e-reader/tablet hybrid device?