Thanks for the link, Josieb1.
I really like the integrated cover. The result looks so slick
Now if Sony could offer the same dictionaries worldwide (and put a built-in light), I could buy it.
The integrated light in the cover may be a good idea, but looking at some pictures it's easy to see that said cover has a bulge in the back. So I can't imagine how to fold back that cover. And as Alvina pointed, with the integrated cover one can't add his own clip-on light. To sum up, without seeing one myself, it seems that the reader will have a lighted device with a cover that can't be folded or a device without light whose cover can be folded. I am not that kind of reader but I sincerely hope for Sony that many people are.
Edit: I gave more thoughts to the cover issue and actually it should be possible to clip a light on the front part of the cover in order to have the light on top of the screen when the cover is folded back.