As far as higher-ed is concerned:
I think in the more practical med/short-term (12 months) we can expect the "dual" use - is it Pixel-Q eink/backlight that I'm thinking of? - screen laptop (or netbook) 10"-15". Most universities are already using a CMS (such as moodle) for distributing class content and interactive activities - so web access is a must. A touchscreen is needed for taking notes in class and for marking up docs and texts.
Seems to me that this is quite realistic within 12 months from what I read. Price will be an issue, and availability of textbooks, and training!
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