A few thoughts.
Sorry if this gets long; I have multiple things to say.
#1 New Hardware
While I understand the concerns of the Mac community, I really think everyone needs to remember that the heart of every Mac -- the OS -- isn't changing, only the guts -- something that's been done before (Motorola --> PPC) and will assuredly be done again.
#2 Intel Inside
This is great advertising potential. While almost no one is as excited about Intel as Mac fans are about PPC, almost no one in the non-Mac, non-techie world has even heard of PPC. I think Apple may get a lot more converts (converts are a good thing, right?) with the image, "Apple, with Intel Inside," though I grant you I can't stand Intel's "Doo-dee-dunh-dee" fanfare, either.
#3 OH MY GOSH!!!! OSX WILL RUN ON A DELL!!!! MY LIFE IS OVER!!!
So what? Get a grip.
As far as I'm concerned, this would perhaps be the greatest part of a switch to Intel (though the facts that Macs will (1) probably cost less and (2) will use newer Intel technologies that backwards-compatible PCs can't runs neck-and-neck with that in my mind), though I doubt it'll happen.
The only risks here that I can see is that (1) Apple won't make enough money just selling the O/S (not a good thing) and (2) Apple will decide that DRM is a good idea to "protect" themselves and will become the next M$. Or that (3) Apple will stop selling hardware, but (thankfully) that idea's more or less laughable...
#4 Apple "Sold Out"
Again, why does going with the same processor maker as most PCs change anything else about a true Mac? By that logic, true Mac users should all be refusing to use PPC models, because they were made by IBM. Anyone here still using only old Motorola models?
Though, admittedly, I kinda dislike this, too.
#5 VIRUSES!
As others said, GNU/Linux and various other *NIX O/Ses have been running on Intel x86 machines for years and have had almost no viruses. It's not the hardware, it's the O/S and the popularity.
Anyway, that's my take.
Now when are the iBooks gonna be updated so I ran get a new one without regret?
