I went in to more detail in the end is near thread, but I want to point out again that the a12z is not what will be in shipping ARM MBP and iMacs. Apple has already said they will be optimized and specific for their intended use eg. a laptop chip will be different than the iPhone chip. If I was to guess it will something like the difference between a 5 watt core y and a 45 watt core I on the intel side. PS: Apple did something like this before with the switch to intel. The chip in the developer MacBooks was much lower performance than what was in the released MacBooks. Apple is merely providing a reference dev platform to get started. PPS; To paraphrase for technology, there are lies, damned lies, and benchmarks!