Yawn...
These quad cores are great, but until they can actually give a clock speed 150% higher than my current, aging AMD64 4400+ (@2.2 Ghz), it's just not worth upgrading. So few apps really use more than one core it's hard to see the benefit over a dual-core. And don't talk to me about "multiple apps": when you run move than one or two apps, your disks, video card and memory usually become the bottlenecks, not just the CPU.
QUAD CORE: the solution to a problem very few home users actually have...but a great marketing win for someone.