The "outdoor screens" that have been around "for decades" are completely unlike Pixel Qi screens. Pixel Qi screens have no color or contrast differences compared to a "normal" LCD, until you take them outside. At that point, the Pixel Qi screen offers washed out colors (in the shade) or grayscale (in direct sunlight) while the "normal" LCD offers a barely visible screen (in the shade) or nothing useful at all (in direct sunlight).
I've been using one for some time on my OLPC XO and will not even consider a new portable with a "normal" LCD.
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