Here are my predictions for this Sunday's special Apple event at NAB:
Version bumps for Apple's pro application suite (FCP, DVDSP, Motion, etc.).
Probably some introduction of a new application/utility to go along with the pro suite.
-- that's all folks -- NO NEW CPU HARDWARE will
ship.
However, on Monday or Tuesday Apple will update the Power Mac with those rumored speed bumps (2GHz, 2.3GHz, 2.7GHz). They will also lower prices by about $300 per system (i.e. the 2.7GHz model will retail for near $2700). As Think Secret suggested, they may also use the ATI 9600 graphics card across the PM line (i.e. the GeForce 5200U will be replaced).
I think the rumored updates to the eMac and iMac will come in a few weeks from now. But, Apple could even announce those this week since there I'm only expecting a simple speed bump to the CPU -- probably
no upgrades in the video and no price changes.
Oh, and one more thing. There won't be a dual-core PowerBook anytime soon. Those dual-core CPUs from Freescale aren't even rumored to be sampled until this fall, so the earliest a dual-core PowerBook
could appear is the first half of 2006. However, the MPC7448 (faster G4 with the e600 core) is supposed to ship this quarter and that will most likely be used in the next iBook, Mac mini, and eMac. But, I don't expect to see that chip (MPC7448) in a shipping product until summer or early fall.
I don't think we should expect any big performance changes in the Mac product line until late summer or sometime this fall. Then we might (finally) see the dual-core 970MP in the Power Mac product line. I don't know if Apple will pre-announce the dual-core 970MP, they probably will
not unless the existing Power Mac sales fall completely through the floor. Until that time, the dual-processor, single-core Power Mac at 2.7GHz will have to do against the new dual-core Intel and AMD competition. Performance-wise it should be okay (not great), but Apple's price points for their Power Macs will come under even more pressure as ever greater numbers of dual-core PCs ship.
Or, at least, that's the way I see it.
P.S. EDIT, I just backed up and read some of the posts over the last 8 hours. Zaty and I seem to agree on most points (
https://forums.macrumors.com/posts/1391004/ ). Zaty also mentioned the HD PowerBook display and I'd forgotten about that. So, I agree, the PowerBook HD may appear at NAB.