Can't see why they would do that since the manufacturing process is the same. Sea Islands is basically Northern Islands on steroids, bigger and hungrier. It'd be better to stick with the already existing, optimized architecture.
PS4 and X720 will probably come up with something on the 1.5-2 TFLOPS range and about 100-120W TDP. That's quite a leap already over current and a certain upcoming hardware. But of course, no 8000 series.







