It is rather astounding that Amiga folk are so disparaging about anything invented after 1990. When I bought my Amiga back in '85 it was *because* is was top of the line hardware, has this community became a hangout for luddites? The Amiga was created out of cutting edge hardware pushed insanely beyond it's limits. That's what I bought into in 1985 and that's what I still want now.
The multicore chips were the best thing to hit the market this century. The old single core P4's are dogs compared to even the lowest end dual cores. I've got a pair of quad cores in my main computer and am astonished at the rendering and video capabilities of it. Try a lot depends on the GPU, but as Karlos says, even basic multitasking is a heck of a lot faster and smoother. I will never go back to a single core for my main machine again.