i think that the macbook pro will get its led, santa rosa, graphix cards, processor, etc. upgrades on the 5th
remember in jobs interview at D last afternoon he said that wwdc will be telling the secret features of leopard and massive investments in desktops.
that leaves the mac mini, imac, and mac pro
the mac pro could get some updates but they wont really be "massive investments in desktops," and also technically mac pros are workstations and not desktops
it is possible that the mac mini could be discontinued, or they could make it into a headles version of the imac. If they made the price of that very cheap, it would be competing with all the pc's out there for the consumers. Now apple would make alot of money off of that so it could be massive investments in desktops.
now the other possibility, which i think is the most likely is a redesigned imac, with santa roas, and possibly touch screen. If apple does what they're best at and gives it a stunning and sleek new redesign, they will get lots of press and publicity, so that could also be a massive investments in desktops.
the main reason that i think that the imacs will get redesigned and have a touchscreen interface, is why steve mentioned what he mentioned at D. he said what he is most excited about and what is the newest to him and a first at apple. Leopard is an amazing operating system and steve is extremely proud of it. MacMini and MacPro would just be spec upgrades and is not particulary exciting and fun to talk about. But a completely new thing for mac users would be redesigned and touch screen imacs at their current prices.
It still is very possible that we see more than one desktop model updated.
I also think that there is a small chance that the apple cinema displays might be updated very quickly, not using a huge portion of the keynote, to give the displays built in isight, improved specs, and a slimmer case.
Thanks for reading this
Julian