OMG!  UDC has just announced it's figured out how to make FLEXIBLE oled displays!  You simple *must* check out the link at Gizmodo (just click on the title of this post)!
Oled is the new technology that makes for great, low-power displays and monitors.  However, the fabrication tech used by Samsung is very, VERY expensive.  And it requires the use of a glass surface which means there's no flexibility.  Anyone who's used an e-ink ebook reader knows that non-flexible also means 'easy to break', which is a big no-no for portable devices. 
The fab method devised by Universal Display Corporation (UDC) allows for flexible displays and is less expensive than that used by Samsung.  "Any day now" (read: up to five years from now) we should see cheap, flexible oled displays.  But we should see (not cheap) flexible displays quite soon.
Hooray!  E-book readers with full-color displays!