I hope I'm not repeating something already said, this is a very long thread, and I've only read the last page worth of posts.
LoopRumors's predictions are wrong. I've seen a lot of people talking about Airport Extreme, and it
would be insane to not equip all new models with it.
But in reality here, Apple has a whole lot of new technology to dump on to their desktop machines. There's Airport Extreme, Firewire 800, USB 2.0 (I think Apple will adopt it), Bluetooth, Ambient light sensors (for screens and such, although a backlit bluetooth keyboard would be unnecessarily cool), and faster processors (GOBI G3s, 1 GHz G4s, etc.). This makes it harder to speculate what we'll see on the next machines.
I think Airport Extreme, faster G4s, and Bluetooth are sure-things for the next iMacs. The real question (in my mind, at least) is about Firewire and USB.
Firewire 800 can't yet replace Firewire 400, and it isn't even on the 12" AlBook. Apple might choose USB 2.0, a PC standard of slight concern (which is enough to get on board with it), over the new Firewire.
Just my two cents.
