I know it's not directly said, but I get the feeling that's what he's talking about in this video at about 1:06 Reducing the 3 surfaces to 2, as in meaning laminating the display.
http://www.youtube.com/watch?v=fjlvmbJEUmk
I think that what he means by that is there is no sides, is that it just tapers right from the bezel, where the original iPad had actual sides