I think you will quickly see battery life in the 6-10 hour range for the new generation tablets. The new intel low wattage processors, advances in battery technology and advances in screen technology will soon converge. Once the battery life is at that level, and their weight reduced by those same technologys.... they would work for most people. If you read more than 8 hours a day, you really need to give your eyes a rest......
Now, those that do international flights, and other not so "everyday" kind of things still need to extreme battery life of ereaders. I love the battery life of my Sony. But, it really matters little to me if I have to charge it overnight 3 times a week or once a week.
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