The PC philosophy is pretty much the anthesis of the Amiga. Driven by Intel it has steadily driven everything onto the central CPU. A standard PC these days has very little dedicated hardware, only the GPU remains.
The Amiga did it the other way around, putting operations into hardware.
In some respects the PC approach did make sense, as processors got more and more powerful there was no need for custom hardware for everything.
However the custom approach does have the advantage of efficiency, something that is becoming more and more important these days.
The Amiga philosophy is however alive and well, the chip in your mobile phone likely has multiple cores, many of these are custom designs. There's the a psuedo-custom approach which uses the increased performance of processors, rather than custom hardware they use a dedicated CPU.
The Amiga was the first computer to put things like a GUI, a real OS (with things like multi-tasking), and hardware acceleration all in one package. Now all computers are like this.
