I don't know about that... The current generation of ARM processors are pretty fast. And you can't beat their performance per watt, so an ARM tablet will get much better battery performance. So long as an ARM tablet can display video well (which will require a dedicated chip for either) does it matter how much faster the processor is? Especially when battery life is taken into consideration?

I suspect wmf meant "uses more power", not "is more computationally powerful".