One Retina Display icon has many more pixels than a whole original Macintosh screen

One Retina Display icon has many more pixels than a whole original Macintosh screen:

Gizmodo shows how far we, and the pixels we love, have come since 1984. On the left, you see the 512-by-342-display on the original Mac (and a few subsequent Macs). On the right, you have a typical 512-by-512-iPad Retina icon that Apple now requires developers to submit with their apps.
Note (Thanks commenters): The actual Retina icons are 114px on iPhone and 144px on iPad and XXpx on Macs (Apple is thinking ahead here).

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