Can I interest you in some fine $400 audiophile wooden knobs?
To be fair, the fancy-pants dedicated chipsets in consoles actually do something, since they offload certain types of processing from the main CPU. Having stuff like dedicated DSP chips on board can help a CPU that is otherwise middle-of-the-road perform a little better. Less CPU used for stuff like sound processing means more CPU left over for AI etc.
But too much of a specialized architecture just makes it harder to program for. The PS3 with its Cell processor is notoriously hard to program for, leading most games on the platform to underperform in comparison to what is theoretically possible.
On the other hand, if you know what you're doing, you can do crazy stuff on specialized architectures. Metal Gear Solid 4 and Metal Gear Rising both look and play amazingly well and run fluidly on the PS3. Before that, Resident Evil 4 on the GameCube was an absolutely amazing achievement, when you consider the modest specs it ran on. But you have to really put some effort into understanding the architecture and work with it.
These days, it's so much easier to just generalize everything, which is why the PS4 and XBOne both feature x86-64 CPUs from AMD, off the shelf PC processors. A trend Microsoft started with the original Xbox and its modified Pentium III CPU.
So it's certainly not an exaggeration to say that today's consoles are simply under-specced non-upgradeable PCs.