At the time i type this the French Apple store does not deliver MacPro's in CTO with Mac os X server ... Delay estimates jump from 5 days to 3 weeks so we can expect changes in Software as well as hardware wise (not that mac os x Server Leopard is ready for prime time deployment). So i would expect another major relase of 10.5. Server revision and a New Macpro (These machines allways have been SCREAMING fast with 10.5 Server regarding 10.5 Client) .
What can we expect from apple at MacWorld in terms of new Macpros would be around this line .
4 Core and 8 Core MacPros.
Why 4 Core being kept ?
1) Not all Applications can thread. (4D , Filemaker).
2) Apple neeeds a cheap entry point for desktop servers. 4 cores is more than enough to run mac os X server , though this may be wrong. but basicly you dont need every desktop in a company to be a full blown server rig.
What we can expect on the coming months as far as the MacPro might be concerned.
1) Faster FSB.
2) Better Memory bandwith , better EEC should do the trick in my humble opinion.
(EEC ram is slow but its is a Server centered machine , reliability matters heavily here DDR3 has its faults and when it fails you face a hardware crash AND it is mainly dual channel to support 8 Cores you would need Quad Channel and suprisingly well no one is proposing such rams , they sure propose quad channel DDR2 and nothing comes to mind in 64bit addressing with those things) . I am sorry for gamers out there but DDR3 bearing MacPros are relatively unlikely , bear as well in mind that MacPros can take up to 32GB of ram , that HAS to fit your needs NO ? )
3) New chipsets from intel. SLI support may be delaying here so i am wondering if we will see SLI support on the MacPro.
4) More PCie lanes than we currently have. (Sporting a smalltree ethernet card a Quadro and a 4GB fibre channel card outspaces the Pcie lanes you have to chose to take one card below its par capabilities).
5) New Cinema Displays (34 inch would be nice in something around 3k by 2k).
6) New graphics cards (though i am very happy with my Nvidia 4500). I tied it to a 30inch screen and voila perfect graphics and a good fast card for 3D of course not really gaming.
7) New Xraids (4Gbit Connects here we come).The Apple Fibre Channel Card shipping these days support 4Gb/s links but Xraid stays still at 2Gb/s
8) Mac os X server 10.5.2 with support for the new machines , straight out of the box usability and deployment capability rolled into one.
Relatively wacky things list.
1) Blu-Ray // DVD-HD (though i am perfectly happy with DVD double layers nowadays) , and the DRM schemes on both new standards are UGLY.
2) New Xraids (4Gbit Connects here we come).
3) SSD inclusion capability for scratch disk users , bootcaches have been introduced with 10.5 so i would expect things to heat up rapidly in this department).
4) AppleRaid onboard integration (Well for hardware raid i keep preferring external drives , call me parnaoid).
5) Digital Audio on the portables.
6) Touchscreen Macbook ?
7) Isight update , Isight integration in screen all across the board?
Unlikely things (NOT LIKELY):
1) Bios support for video cards (too many vendors , insecure and let us face it 99.999999 percent of mac users dont want EVER to see that BIOS screen again).
2) Windows becoming secure.
3) DirectX support on mac os X.
4) Steve Balmer wearing a turtleneck. see picture what that would do to the turtleneck ... (soaky).http://macdailynews.com/index.php/weblog/comments/9050/
5) Zune becoming popular (i have to get generic to point how unlikely previous events are).
Add your own.
Some of these are not prioritized at all but if the MacPro is to evolve some of this might be worth considering.