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The reflective LCD of BlackBerry 7730 is very suitable for being used as the e-Reader's display if increasing its resolution and extending its size to 9 inch, because the reflective LCD has very good refresh rate comparing to e-ink, and does not cause eye strain comparing to IPS screen of iPad and other tablets using LED backlit. Also,this LCD has good reflectance. Color fidelity is not so important for reading most of ebooks except fashion style magazines.
Which LCD factory produced the reflective LCD of BlackBerry 7730 and why not use it to 7 and 9 inch ebook readers? It will be better if Amazon considers the kind of reflective LCD as Kindle e-Reader's display.This LCD is based on the existing mature technology and therefore easy to put into mass production.
Moreover, another kind of color reflective LCD developed by Japan Display Inc in 2012 has 40% reflectance.