Sony on Wednesday unveiled a new Walkman line that appears tailored to compete with and beat the new iPod nano in terms of sheer features. The A840 is not only the first Sony player to be almost as thin as its Apple counterpart, at 0.28 inches thick, but has an even larger 2.8-inch display that uses OLED. The swap gives it better color reproduction than the iPod's LCD and supplies a long 29 hours of music playback, or nine hours of video.
