If you are saying ARM isn’t powerful enough for top end systems, that’s nonsense. “Power” is a function of the chip design, not the architecture. Apple could easily add more cores to the A10, bump up the clock speed a bit, increase the size of some buffers and caches, and use a better thermal solution, and compete quite well with current high end intel chips.
I don't agree, it's not that easy and that's not how it's designed. That's why you don't have ARM anything being faster than Intel. Or Microsoft could just make an ARM tablet that runs as fast as the Intel counterpart.