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Interesting. And a little disappointing- as indeed it nearly defeats the purpose of the enhanced display. Nevertheless, I think that the new screen will still make images look significantly better than the iPad 1/2, because the finer pixel pitch means less "screen door effect".
I'd contend that part of the reason the new iPad screen looks so great in contrast is because the original screen was just so-so to begin with. My Toshiba Thrive has a more dense pattern to its IPS matrix so seems like a smaller quality leap to the new iPad than the old iPad does, if that makes any sense.