Originally posted by Nilsen
They will prolly run different kinds. The Powerbooks , iBooks and mini will get some M variant, The high-end will use D and The cheaper models will use pentium 4.
The Xserves will run on Xeon.
Xserves already run on Xeons.
My guess is someone will hack the OS within weeks to run on "any" pc (ie something matching Apples hardware specs). As for being 64 bit, OS X isn't really, it has ONE 64 bit library that is rarely used - so moving back to 32 bit CPU's won't be a huge issue.
Plus Apple have really started to bastardize the underlying BSD libraries putting their own stuff in. The network stack got worked over in Tiger, and they added Widgets (custom made for Virus writers it seems
)