I found this shot, granted it's an XO/OLPC PR photo, but it shows that the current display in the XO looks easily as "easy" on the eyes as the current eink displays:
http://www.flickr.com/photos/roberto...7603902252242/
And here is a side by side of one of the Sony devices (I honestly don't know which) and the Ectaco Jetbook:
http://www.flickr.com/photos/vzaliva...50790/sizes/l/
http://www.flickr.com/photos/vzaliva...57576/sizes/l/
Here is that whole set:
http://www.flickr.com/photos/vzaliva...7613862806614/