When watched this video of someone bending the iPad 2's display glass I couldn't believe my eyes. Play it and see what I mean for yourself.
While the iPad and iPhone's glasses can shatter easily, they are all incredibly bendable. To the point that it's hard to believe that this is glass and not plastic.
And according to iFixyouri's test, the iPad 2's glass is a lot more resistant to breaking by bending than the original iPad, even while the former is quite thinner than the latter. iFixyouri also claims that, after multiple drop tests, they couldn't break the glass (don't try this at home, though). [9to5Mac]