Ok, I am semi-mac newb (started using apples as my first computers, IIe->MacPlus->Classic) and am just now starting to get a feel for the mac world, but here is my prediction...
No SIGNIFICANT PowerMac upgrades are coming soon. Seems like they are just getting enough of the new G5 cores to start shipped limited quantities in XServes; I am unsure that they will be able to deliver enough for PMs. I am thinking that there will be a price drop, and maybe the single CPU system will go to a 1.8ghz. I would be VERY suprised if they improved the top model, but if they do it wil be small, like 2.15 or something like that. This will be soon, next few weeks/a month tops.
iMacs/eMacs will get a little spec bump coupled with a small price drop. I'm thikning 1ghz will go to 1.25, 1.25's will goto 1.33, add some more RAM to some of them, a slightly improved video card (GF4MX in eMacs? maybe some more VRAM in the iMacs?). I am guessing this will be shortly after the PM upgrades.
PowerBooks will get a nice bump, but no G5's. I predict 1.25ghz in the 12" SuperDrive line, 1.25 in the Combo 15", 1.33 in the Super 15", and a new 1.42 in the 17". 512MB RAM will become standard in the Combo 15", HD's wont change, except they will add a 120GB 5400rpm option on the top end. Video cards will get some chages, likely in the top two models we will see the 128MB version of the 9600. Not sure if they will put it into the Combo 15". This will be soon, I am eyeing the 30th. Significant price drops will come with.
iBooks will see some small improvements shortly after the PowerBooks, maybe the same day, but more likely a few weeks later. It'll be a simple CPU swap. the 12" will get a 933mhz, the 933mhz 14" will get a 1ghz, and the 1ghz will get a bump up to 1.25ghz to match the lowend PowerBooks. RAM will be added. I am hoping that it will be in the form of 256MB on the motherboard, for a new 768 max ram configuration. HD's will get bigger, I think 40/60/80. Not sure if the 9200 has 64MB version, but look for it in the 14" models if there is. If not, I have a feeling that there will be a video syste, shoft for the 14" but not the 12'. Something with 64mb of vram. I also think a small price drop will accompany.
This, to me, falls in line with everything. It will give a nice 7-8 month window for G5 powerbooks, and keep the ibooks relative performance/rpice wise. The PowerMacs won't hit 3ghz this year, from what I can tell. I bet they will announce it in December, but they won't ship 'till late 1Q 2005. This will fall in nicely, as there will be a big bump in speed later this year as shipments of the new G5 core increase, and then about 6 months later the big leap to 3ghz. It probably wont be till then that we see some 1.6-1.8ghz G5s in the powerbooks, and the iBook like will get the fastest G4s they can still dig up.
So there it is. If I am right than you all we me a beer.
Rob