AMD has spoken out about the hardware they're developing for Sony’s PlayStation 4, which as you may know by now is a X86 x8 core 1.6 - 2.0 GHz mobile APU that is not all that dissimilar from one you would find in an everyday gaming PC.
AMD executive, John Taylor announced that AMD will be crafting a modified edition of the custom hardware chip that it built for Sony. It is likely that Sony has some custom hardware in their edition that would not work in a general PC environment, so you are never going to get a "like for like" piece of hardware.
Their chip may not be as powerful as the PlayStation 4 edition, but Taylor said that the PS4 chip was by far the strongest APU made by AMD so far and that really is saying something. With 1.84 teraflops of power, a Radeon graphics engine, GCN hardware and support for GDDR5 RAM, it will certainly be interesting to see just how close a PC edition can be, given the alterations that will need to be made to ensure PC compatibility.