Definately a PowerMac which will go above 3.0 GHz, 3.2 or 3.5 is my guess. Starting at $1,499
Also, the eMac will go 1.5 GHz standard and will go to a 20" CRT but stay the same price. Starting at $799
Mac mini Rev. B, change it from DVI to Mini-DVI and will include extra USB, and a FireWire 800. Also, the front will get a nice USB 2.0 port and the power button moved to the front and it will grow an extra 1/2 inch on each side and from top to bottom to accompany a 64 MB Graphics Card, and the options will be: $499 for a 60 GB HD and $599 for an 80 GB HD - these will have 32 MB RAM, and $699 for a 100 GB HD, 64 MB RAM, and much more... This will undergo the most changes.
Also, minor iPod changes, drop the iPod photo and make it standard. Also, it will NOT have anything else, except an increased price for each model by $50 to include all the cables... so for the next update they can get rid of the lower price without any cables.
Also, PowerBook 12" will die and a 13" Widescreen will take its place, the 13 and 15 will have 1.5 GHz G5s, and the 17" will have the first G5 processor at 1.6 GHz. Every model's keyboard will be backlit, and each model will have digital out on audio. Starting at $1499
The iBook will recieve a new form factor and will go to 13 and 15 inches as well but will have a lower quality LCD. Also, these will go only to 1.3 GHz Max. The iBook will have AE standard but bluetooth as an add on. Starting at $999.
Also, Apple always had that 'grid' thing, for each desktop, there is a notebook. I therefore think that there will be a new Apple notebook, or really, a tablet, called the Apple Book mini.
THE APPLE BOOK MINI:
-1.0 GHz Processor G4
-12" LCD Screen
-2 USB, 2 Firewire
-Touch Screen Display
-OS X 10.4.1 Optimized for Tablet Mac
-32 MB RAM
This will start at $999 as well and fill the gap of the Mac mini being alone.
Of course, a 14" Book mini will be available and have a 1.25 GHz G4. This has 32 MB RAM and will be $1299.
iPod shuffle will go from 512/1024 to 512/1024/2048, the 2 GB model will have a one line LCD screen... The 2048 will be $199, and while it may be a ripoff and be able to get an iPod mini, this is USB 2.0 compatible and will have one extra, unnamed feature to make it more attractive.
Apple will also update the keyboards form factor, AND FINALLY release that 2 button mouse with a scroll wheel! It will be two buttons and the same, thumb sensitive scroll wheel thats on the iPod to scroll through pages.
Apple will also release iWork Premium, and it will be the "MS Office Killer," priced at over $299.
Apple will show off the iTunes Motorolla phone and make people all excited about it... it will have iTunes and iCal and Mail.app also on the phone, and have over 512 MB of space - basically, the Apple PDA. And it will be a PDA phone. It will be sold for over $400 at every Apple store, every Cingular, Verizon, and TMobile store.
Apple 10.4.2 will be released on June 11th, and previewed on June 10th of the WWDC - it will add a 'revolutionary' new feature to 10.4.2, and every person who buys Tiger as of that day will get a free disc to install 10.4.2, and whenever someone goes to buy Tiger after that, he/she will be purchasing 10.4.2, not 10.4.1 or even 10.4.0.
These are all just guesses, and I doubt any of these will actually happen, but hey: it could.
Sorry for the long post!