Cache is the new GHZ
I predict you're going to see more cache tossed about as things heat up between Intel and AMD -- lots of cache helps to keep plenty of code and data nearby for those multi-cores to chew on and stay busy.
You want to minimize hogging the FSB having to go to the Fridge (Memory) or God help us all the way to the Freezer (hard drive).
This goes hand in hand with the new onboard "disk cache" Intel announced ----- this will evolve into a L3 cache sitting between the Fridge and Freezer.
Lastly - look for algorithm wars on how best to clevery up relevant stuff in them caches