eReader devices such as the Amazon Kindle are made for a tiny niche of consumers who want digital content (magazines, books, newspapers) on-the-go. A laptop or smartphone is excessive and even inappropriate for a purpose so simple as reading.

Why? Our computer displays are like TVs. Good for motion pictures, not so much for scanning pages of print.

Transmissive LCDs, prevalent across consumer electronics, require a backlight to illuminate the layer of liquid crystals. These screens are fine indoors, but appear dull and muted if brought out in daylight. For serious reading, they should set at decent refresh rates to avoid eyestrain (above 60Hz, please).
The displays on eReaders, however, are different.
Without delving into the technology, eReaders use eInk displays that deliver high readibility (high contrast + high resolution) with much less power consumption.

eInk displays are reflective–if you bring it out in the sun it only gets brighter–and can be viewed comfortably from any angle. That’s why the eReader beats a laptop or iTablet when it comes to reading. Think of your eyes.

One obvious downside is you can’t read in the dark. And damn, these things are expensive for not having an color. But I still want one! I love reading newspapers, but they don’t always fit in my bag and it’s troublesome when they accumulate. I enjoy the tangible nature of paper, but again, it piles up.

To Amazon and all the other eReader manufacturers: cut your prices, throw in the option of an LED backlight, and start developing those color eInk displays.

Also, eInk is thin and can be made very flexible. Even if eReaders don’t take off in popularity, I can see eInk replacing paper in many forms.