No OCR is planned AFAIK. It was just suggestion/idea of one user.
Pen is usable for handwriting unless one has very tiny script. Tip of pen is not as sharp as ball-pen or pencil.
You can add dictionaries and switch between them. Tapping on word works only under certain conditions. There should not be accented letters and probably coding should not be unicode. You do not need multitask, at least for pdf. Others documents I do not know.
It is as heavy as tablet. It is not designed for one hand operation. But with big screen one needs flip page only time to time. And it is doable by one hand, if you have big hand and long fingers. It is better to read while sitting. The same as with any bigger paper book. Reading while standing and holding book in one hand is not top comfortable.
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