e-ink. Cool…but…meh. Amirite?
Check out PaperTab, developed by Queen’s University in Canada. It’s a paper-thin working tablet that can work with other tablets like it when in the same proximity.
You still need to hook this stuff up to a processor to do the work, but the whole thinner/smaller/mobile world keeps doing just that: Getting thinner, smaller, and more mobile.
Discovered at Stuff and humanmedialab.