I'm definitely not an Apple fan but what's available on the market at any given moment is an apple to apple comparison of what companies are able to do. I mean: any modern army (or pary of) would crush Roman legions, but they had to do it 2000 years ago.

The article ends wondering about the impact on PC OEMs. I presume they are extrapolating the performance improvement curves, talking with Microsoft about Windows on ARM and working at HW contingency plans in case they have to leave a sinking x86 ship. I don't think they are resting on promises of big improvements from AMD and Intel.