What I find funny is that a lot of people here are saying IBM did not deliver and Apple made the right choice to switch to Intel. But what everybody seems to have forgotten is that Intel also hardly made any progress in clock-speed the last 2 years. They went from 3 GHz to 3.8 GHz. (27% gain) while the G5 went from 2 GHz to 2.7 GHz (35% gain).
Intel promised its customers 4 GHz by january this year. We're at june and they can still only manage 3.8. GHz.
Although I agree the Pentium M is a nice laptop chip Im much less impressed by their desktop offerings.
I think Apple also took yet another risk basing their decision on a future roadmap. The did the exact same thing with the switch to the G5. They (and IBM) thought that the next process was going to be more power efficient and allowed for higher clock-speeds (+3 GHz) than it turned out to be.
With Intel they are now thinking that the future chips at 65 nm process are going to be faster and more power efficient than the PPC offerings. But if Intels transition from 130 nm to 90 nm gives us any insight to the future, I wouldn't be to sure of that.
I would not be surprised if the PPC, if it continues to be developed, will remain competitive with Intels offerings for the desktop chips.
Only for the portable market Intels offerings look at bit better, but we still have to see (if we will) how the Freescale MPC8641D and future e700 core chips with speeds above 3 GHz will compare.
Steve Jobs reality distortion seems to have worked wonders again on the majority of people on this board. Only a week ago the general consensus on this board was that x86 is outdated crap that runs way to hot (think Pentium D), and now after Steve said "Mac-Os runs great on Intel" everybody seems to think Intels x86 chips are the best thing since sliced bread.