Oh i think we're going to shift to some amazing PowerPC processors. Steve will be announcing a complete product shift over to some really fast 1.3Ghz 'G6' processors from Hitachi... blah
I can see apple offering a Duel Quadcore version of the current mac pro - coming in a 2.4Ghz intel have announced the processors and it would make sense to provide such an option.
as for the other options... come on worst