Apple’s new eMac line includes a new Apple Keyboard with slightly more sloped look from the side and new plastics plus a centralized USB hub as opposed to both ends on the old Apple Keyboards. The eMac also ships with a new Apple Mouse, though the changes / specs, if any, are not noted. No word yet, about whether the new input devices will be shipping with the iMac or the Power Macintosh machines.
See the new keyboard and mouse here.
(Thanks, Nagromme. Updated 5/7, 7:53 AM EDT)