I've some sympathy as hardware is a mug's game and price competition when it does hit is absolutely brutal.
That said, the 10" and 13" displays available now are excellent, and are being found in Android tablets (sold as e-book readers, but fully general-purpose). The Onyx BOOX line for example.
Android itself is hugely limiting in numerous ways. I'd like to see actual e-ink laptops, and suspect we will before too much longer.
A quick note on power use: if the device is only used for reading reasonably static text, battery life is exceptional. Once radios, backlights, and in particular web-surfing are added to the workload, power draw really ramps up. You'll get a full day or two off a charge, but not a week or more as with reading books.