Looking at decent e-ink devices to write notes on, I cannot understand why they're so expensive. For the price of a remarkable 2, for instance, you could buy an iPad which supports note-taking, and much more.I know there are some advantages to e-ink displays, but I don't think that's enough to justify the high price tag on these readers/note-taking devices.There's also hidden costs involved, such as buying new tips for the e-ink pencils.Has the e-ink industry reached a dead-end where patents are impeding progress, or are there other reasons involved?