Come Monday, if nothing is announced at NAB, I'm clicking the "place order" button on my 8 core mac. I figure sure, I may not need it all right this second, but what about 6 months from now? how about a year?
Plus, think about how fast Firefox and Adium will run on an 8 core with 4 gigs of ram!
Exactly the same speed as it would on a 4 core with 4 gigs of ram.. neither program is threaded to use more than one core, is is the case with 99% of the software on the market.
On the other hand, if you were at the same while surfing with Firefox, running Adium (neither of which are really going to run any slower on a single core machine as they don't use alot of processing power) playing music on iTunes, encoding a DVD for your iPod, using photoshop and running folding@home at the same time.. then ya, you'll notice a difference with 8 cores.
Even a year down the road, your not going to find many more threaded programs that will make use of more than one core, I mean, dual core (CPU) computers have been out for over 15 years and really, theres only a handful of programs (not counting OSes) that will take advantage of more than one processing core.
People seem to think that having 8 cores is the best thing since sliced bread.. what they don't realize is yeah, if you use a high end program that will use it it's great, otherwise your just wasting your money really.. and it's only high end programs that are going to take advantage of it for a very long time.
On the otherhand, if you regularly run 8 different programs that are doing CPU intensive work (most are just sitting idle like Adium, BBEdit, etc. waiting for the user to do something with it) then each program will use a different core that has the currently lightest load.
There's alot of confusion over the benefits of more than one processing core, kinda like people comparing clock speeds on AMD and Intel processors. People are just starting to get it through their head that clock speed does not equal a CPU's performance unless your talking about the exact same CPU.
I still say the majority of non-pro people and a fair number of the pros will not see any benefit from 8 core over 4 core machines