While doing some bibliographical research for my own PhD, I came across some papers on the ergonomics of epaper displays.
I thought this could be interesting for someone... or not
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Preferred viewing distance and screen angle of electronic paper displays
It seems that the reading distance of those devices is the same that any "classic" display unit, i.e. farther than usual paper...
http://www.sciencedirect.com/science...b062ea04e13553
Effect of character size and lighting on legibility of electronic papers
This paper conclude that epaper need more illumination and greater font size to be usable...
http://www.sciencedirect.com/science...5779f9b3f713ab
Effects of anti-glare surface treatment, ambient illumination and bending curvature on legibility and visual fatigue of electronic papers
This one conclude that manufacturers can lower costs by using cheaper anti-glare...
http://www.sciencedirect.com/science...61ea916829ae4d
In any case, it's not that kind of "review" that will help faster dissemination of eink across the population...