E-ink isn't realistic? There's several devices shipping now that have e-ink (Amazon Kindle, that Sony ebook reader, etc). Now e-ink isn't usable as a primary display for most applications due to slow refresh, but it could make a fine secondary display, and it can be made thin enough to be embedded into a protective flip cover.

Except for the price, but that should be coming down soon. So in that case, it might need to wait for the n950.