[ProDigit]

E-ink is here to stay, for the mere reason of energy efficiency; which is the main problem in Africa right now.
Companies all over have spent research and development into making computers accessible and affordable, but they haven't taken into consideration, that large parts of Africa, and Asia, still don't have access to a steady form of electricity, and some have no access to it at all.

The next generation of computing devices may be truly ULTRA LOW power devices, and an E-ink screen with glo-light, would be preferably in Africa; as they only need to be recharged on a weekly base.

If you're lucky, in remote regions of Africa, you have access to electricity about once a day. Some, only have access once a week, when they take their car batteries to downtown to be charged up.

Life in Africa dies down after sunset anyway, so an E-ink device will be perfect for the day activities of children, if it wasn't so expensive to manufacture!

And there's always the fear of someday be without electricity. Perhaps go a week camping, or be traveling a lot, and battery life in such cases is a necessity.
And there are the psychos who think one day their country will be nuked, and without power for weeks... Then having an e-ink device is a godsent from heaven!

If you ask me, e-ink is a technology to stay,
However, I do see future developments of E-ink in computing devices like mini laptops, for programming, creating web-content (HTML pages), as wrist watches, and as a monitor for servers or routers, and the sort...

Concerning the theory that long reading behind an LCD screens isn't comfortable, that's been long undone.
The only reason is that people put their monitors at the same brightness as when they watch movies.
When reading black text on a white background, the screen brightness and contrast often needs to be put all the way down, to the point when you are looking beyond your monitor (the wall or scenery behind it), your monitor should not stand out in brightness, but have equal brightness. Then up it one or two clicks on the brightness.
That's the proper way of calibrating a monitor.
Some companies don't even know, as their monitors often don't even go as low in brightness than is required. In such cases, Windows users can use a program called "DimScreen", and Android users can use "Screen Dimmer".
I'm sure Apple devices have their own apps as well.

But wrongly calibrated monitors are the main cause for tired, and worn eyes from long read sessions behind an LCD.
Plasma tv's, and CRTs, are the worst to read behind. They really can burn your eyes if you're too close to them for too long.