I am writing this from my 8 core Intel box running Linux with 8GB of memory. This is the FASTEST computer I've ever had and the first time I've noticed a big leap forward. I normally don't care about cpu speeds, graphics cards, etc. Hardware tends to be fast enough for the current generation of software (I run Linux) and that's usually all you need. But this 8 core thing is different.
I develop and run very heavy graphics applications, where cpu tends to be the bottleneck. In my world, you used to rely on extra cpu from render farms or clusters to get the job done.
This world is changing. Shorter kind of jobs that require a quick turnaround, can now be done locally instead of sending jobs to the render farm. This is massive. As people start doing more jobs locally, it also frees up space for the longer running batch jobs, so they get done faster too.
When I first got the machine, it had Windows installed and it felt just as slow as a regular (single or double cpu/core) box. That should be of no surprise to anyone around here. But Linux sure knows how to use the multi core magic.