Quote:
Originally Posted by NatCh
The front of the panel is not on the Sony (though the iLiad's is), but the back surface may well be, and we don't really know that the front isn't just plastic laminated glass. Lots of things are made of glass that you'd never suspect, actually.
One of the specific comments Sony made during the Bloggers' Day event last year was that they were strengthening the display's backplane prior to launch -- this suggests that they thought it was fragile enough to need reinforcement. 
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Granted I don't have the complete, specific display specs for Sony's Reader. But everything I've read regarding the e-ink displays has indicated that it is not based on a glass panel, but on plastic. In fact, many e-ink displays (although apparently not Sony's) are quite flexible.
If anyone has different information, please post/link to it (as I am also generally interested in the display technology itself). But I have seen nothing to suggest that the Sony display is made of glass. And my sense from using it is that it is not. (It would have to be very thin glass, which would be extremely fragile for a display of that size. Just removing and replacing the cover would inevitably lead to cracking of a glass display imo.)