Originally Posted by murraypaul
In the promo image it looks to be putting out more light than an iPad or Nook Color at lowest brightness. It isn't going to be magically better for the eyes than an LCD screen.
Needs to be seen, but I would expect it to be no worse (and probably significantly better) than an LCD display. And the battery life is not too severely impacted, you should still get several weeks worth of reading if you don't have the light on all the time.