"Paperwhite is the Kindle we've always wanted to build - the technology didn't exist to build a display with this level of contrast, resolution, brightness and battery life, so our engineers invented it, " said Jeff Bezos, Amazon.com Founder and CEO.

ENGADGET: Amazon announces $119 Kindle Paperwhite with illuminated, capacitive touch display

Others value other factors such as resolution, color balance, brightness, portability, etc.

FORBES: Apple CEO Tim Cook On What's Coming Next: 'We've Got A Lot More Surprises In Store'

The screen is really great, with a good amount of viewing angle and brightness for the category and plenty of resolution to differentiate HD content.

ENGADGET: Panasonic DMP-B15 hands-on Hands-on

The screen the Pixel has is -- as you can imagine -- one of its proudest features, sporting a 2, 560 x 1, 700 resolution, giving a PPI of 239, and offers a brightness of 400nit.

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