This is just a rumor, but Apple might be announcing a screen that displays 4520x2540.
If it's true, Apple will either be releasing a rather large screen, so that the pixels aren't microscopic, or updated the OS so that all elements are resolution dependent. Some of the menus are still locked to a set point size.
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I be a hearty pirate that plunders many waffles.
The Dread Pirate Monkey Gizmo has scurvy! :)
Nintendo DS and Wii, me gaming machines of choice.