Let's make a petition for someone to produce this e-ink open arm laptop. I'd buy one immediately.
My understanding is that the big issue is that e-Ink displays have a miserably slow pixel update time. The new Kindle Paperwhite is on the order of 450ms whereas the average LCD display is in the single digit ms range. Great for static text, but horrid for anything real-time.
I wonder how it would be on a newer eink screen.