Readability/eye strain
I always thought that the main advantage of ebook readers over reading books on something like a monitor was the way that e-ink allowed users to read for a long time without eye strain etc. What's the point of it running for 122 hours if you get a headache after a couple of them?
I hope the e-book reader is not going to hijacked by firms making 'tablets' of the same format as current ebook readers but not using the eye friendly displays that are, at the moment, one of the main unique selling points of e-book readers?