[OtterBooks]

The entire ebook/ereader market as it now exists was defined and created by e-ink and its dedicated devices. IMO tablets are irrelevant to their price other than possibly increasing the production of some shared components and increasing the competition for consumers' disposable income, unless they release book sized tablets with e-ink displays (or equivalent tech) suitable for that level of computing power, which may be a while.

If the demand for ereaders were about portable computing then they wouldn't exist, nor would the Kindle (et al) have sold eleventy-five gazillion units in a market where your average Android phone makes an ereader's computing power look like a pocket calculator.