You will find this comment is common with those that either don't read a lot or haven't used eInk screens. They don't understand what it's like to spend several hours reading text on an LCD versus eInk. You really have to experience reading 5 hours or so on an LCD versus 5 hours on eInk to understand the difference. Either that or try to read an LCD in sunlight.
eInk is printed text quality, it's crisp, there's no refresh (static image) and it doesn't make your eyes water after a few hours. I was using my touchpad (loaded with cyanogenmod) to read an ebook last night and after several hours the text was so grainy I could barely stand it and was having problems focusing on it to the point that I wanted to go get the eInk reader so I could continue reading. I like the versatility of android tablets and prefer to use them in general but if I'm going to read a lot I prefer the eInk screen for long term or outdoor reading because it's so much easier on the eyes.