AMD's desktop chips are certainly better than the Pentium 4 and its ilk right now. But that's not where Intel will be in 6 months, and I can guarantee you will never see a Mac on store shelves with a Pentium 4 (or other NetBurst-based processor) in it. You'll see Macs based on Conroe/Merom, which will be quite competitive with AMD's offerings, as they do more work per clock (rather than Intel's previous strategy of ramping clock speed to insane levels). And AMD's mobile offerings BLOW compared to Intel's Core Duo/Solo chips. Turion is not a competitor.
Personally, I'm excited by the Intel switch. Macs are more expensive because Apple finances their software with the profits from their software. It's worked for them for years, and I see no reason why it'll change now. People who need Macs will still buy them, those who become convinced the benefits of the Mac are worth the price differential will buy them... so what if our market-share doesn't go up? Apple's survived at every turn when they were supposedly "doomed." I don't see what makes you so much more enlightened that you've seen the true future where all the others before you have been wrong.
Personally, I'm excited by the Intel switch. Macs are more expensive because Apple finances their software with the profits from their software. It's worked for them for years, and I see no reason why it'll change now. People who need Macs will still buy them, those who become convinced the benefits of the Mac are worth the price differential will buy them... so what if our market-share doesn't go up? Apple's survived at every turn when they were supposedly "doomed." I don't see what makes you so much more enlightened that you've seen the true future where all the others before you have been wrong.