Porsche, you have to understand that PCs have caught up with PS3 within.. actually, Apple has been ahead of the PS3 for over a year when it was introduced. Other companies are catching up as we speak.
The PS3 introduced a multi core gaming processor, 3 processors to be exact, which is often split upon graphics, physics, whatever else.
You can buy Dual quad cores these days, PCs are dramatically faster these days, just not at the same price.
Not to mention, Dell makes a WoW LAPTOP yes, LAPTOP, with a full size 5.3" hard drive, a PhysX card, and dual SLi nVidia cards.
So much for 3 cores, and a nice graphics card.