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Who is to say we don't just skip the whole quad-core thing and go more?

Intel Corp. detailed a prototype 80-core processor made up of tiles laid out eight across and 10 down. Intel's chip also has a "sleep/wake" function that turns off power to some tiles when they are idle and wakes them up when they are needed, said Yatin Hoskote, principal engineer at Intel.

Here is the rest of the story. I never read through it all, but what I saw was rather interesting! http://news.yahoo.com/s/pcworld/20070821/tc_pcworld/136214;_ylt=AtJvs7J2PWryWl93H0DvqscE1vAI
 
multitasking

People forget that OS X is unix, it inherently takes advantage of multicore. Boot up, and before you open any apps, run top or activity monitor just to see how many running processes are out there.

Personally, I have 3-4 terminals, 2-3 virtual machines, and 3-4 apps running all the time. Even if none of them were multi-threaded, they still are unique processes that can be scheduled on any core.

More cores = unix goodness
 
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