You are way, way off on your calculations. The Cyclone IV "MIPS" you are talking about comes from the built-in ARM cores so you're comparing ASIC to ASIC here.

You are way, way off on your calculations. The Cyclone IV "MIPS" you are talking about comes from the built-in ARM cores so you're comparing ASIC to ASIC here. An FPGA vs ASIC, FPGA will lose every time. It is a simple matter of architecture. You have more crap to make the FPGA an FPGA, whereas in ASIC you have optimized gates. So it doesn't make sense for Intel to ship FPGA + CPU for consumer/mobile. Period. You burn more power and no one needs it. FPGAs are also more expensive because they take a ton of silicon space for a comparable function. FPGA SoCs like Xilinx Zynq or Altera's offerings are widely used but for specific applications, none of it really consumer/mobile/desktop. Stratix IV FPGAs that you are talking about are many thousands of dollars, each. You can get them today and hang them off your PCIe bus and do whatever you want with them. There is nothing stopping you. Putting it on the same die as a CPU won't buy you anything you don't get today -- except a lot of more heat you have to get rid of. I don't think electrical engineering works the way you think it does. For reference: I've designed ASICs and have done a lot of FPGA work in the past 10 years.