So when is someone going to release a Kickstarter for a small laptop with a 10.2" [0] ePaper display so I can finally work out in the sun?
E-paper just doesn't seem ready for that type of application right now. It's for displaying big pieces of text - not interacting with text, not showing images, not writing on, nothing. Its primary purpose, which it is fulfilling pretty well actually, is showing a page full of words. It's not very well suited to anything else.
If the technology improves (primarily in contrast and refresh rate) I'm with you - but for now, it's not a good option.
If your computer/laptop has VGA/HDMI or composite out you can use our Pixel Qi+Controller kit http://www.adafruit.com/products/1303 for modern laptops with a 40 pin LVDS cable you can just do a swap out as long as the screen's the same dimensions.
Smartphone + E-paper = long battery life :D
People can actually try what it's like by hacking their Kindle: http://www.raspberrypi.org/archives/3621
I find that it's goof enough for most stuff, if you get your vim keybinding right.
http://www.makershed.com/Pixel_Qi_display_p/mkpq01.htm
I installed one on a Lenovo Ideapad S10-2. It was OK, but not nearly as easy on the eyes as an E Ink screen.