It doesn't seem Apple-consistent to move some of those hot keys around, since they won't fit with some of Apple's other products. For example, if that's the new layout in that prototype, where will Apple put the hotkeys for the keyboard backlight on the MacBook Pro? Why only one key for Exposé? There are three Exposé hotkeys. And what about Spaces? Why no hotkey for that? Since it is a prototype, I bet the moving around of some of those hotkeys will not be present in the final shipping version.
Yeah, it should be...
F1: dim display
F2: brighten display
F3: mute
F4: sound down
F5: sound up
F6: rewind
F7: pause/play
F8: forward
F9: desktop
F10: Expose
F11: Spaces
F12: Dashboard
F13: Eject
I think this is more logical and would maintain compatibility with current models.