Amazon granted a dual-screen e-reader patent, will it effect B&N?

Amazon were granted a patent (filed in 2006) on e-readers with secondary LCD displays. This is a surprise, and we're not sure whether it'll effect the Barnes&Noble Nook. Here's the patent description:

A handheld electronic device comprising: a housing; an electronic paper display disposed in the housing and having a first surface area; and a liquid crystal display (LCD) disposed in the housing proximate the electronic paper display, the LCD having a second surface area that is smaller than the first surface area of the electronic paper display.

Via Engadget