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Water and dust proof, I remember when that was extra cost option for watches about same time shock resistance became common. Now every watch must have this before I would consider purchase. Expect same will soon be true for kobo ereaders. First should make one 5 inch screen model unbreakable and larger screens also. Dust and water proof could rule out IR touch while must keep great contrast, resolution and battery life. Try a limited edition to see how it will sell this time.
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