...the possibility of a G5 PowerBook was simply an issue of good, solid engineering
I was so happy to hear this!
I translate this to mean that the Apple hardware team doesn't give a damn about people in forums saying "the Powerbook is finished if they don't put a G5 in"-- they're keeping their focus on designing good products.
Frankly that's all I can ask for.
People in these forums talk like the very talented folks in Apple R&D don't think about these things before they make decisions.
If IBM is willing to source two chip families, and the talk of Altivec'd G3's implies they might be, then it may just turn out that we see the portables based on one family and the desktops based on another for quite some time.
That would be a
Good Thing, folks. It means no compromises. Let us not forget so quickly the compromises of the G4 desktops. We'd have a rocket of a desktop and slick portables.
...rather than reasonably slick portables and reasonably slick portables in a desktop case.
There's also a (albiet slim) chance that Mot comes out of it's coma and releases that dual-core G4.
The G5 doesn't have to obsolete earlier generations. I've been running a G3 iMac for 4 years and Altivec didn't kill it like my Wintel experience led me to fear. Apple has done a great job keeping these viable with OS X.
In the Wintel world, MS doesn't care if people are unhappy with their recently bought Intel boxes as long as they can say their OS has such-n-such. In the Apple world, Apple doesn't want to alienate their hardware buyers by needlessly limiting the lifespan of their purchases.
It looks like the primary benefit of the 64bit architecture right now is deeper memory and Panther looks to address that by allowing more memory on G5s while staying G3/G4 compatible.
While there are niche buyers who might want 8GB in a laptop, I don't think that's going to render a 2-4GB laptop obsolete.
Even Intel maintains that 32 bits is enough. I think some of that is defensive, but it does indicate that the highest volume processors will stay 32bit for a while.
And going to 90nm doesn't necessarily mean lower power... The 90nm Intel Prescott is rumored at 103W!
So tying this all together, based on that little comment in the article, I'd say that Apple hasn't lost their heads-- they're worried about making good products. Maybe that's a G5, maybe it's something else. Either way I wouldn't be dissapointed...