Add the GPU and Direct X, and Encode/Decode functionality I know this is not the subject, the ARM processors simply cannot keep up. The author did also mention the limitations of the comparison also as mentioned above the Skylake Xeon is capable of running Hex channel ECC Memory with huge capacity that alone will outpace everything on ARM it's not a fair share of comparison at all. GB is an OS level optimized bench. There's simply no comparison point that exists.
Like I'd say to the author do a 4D render bench like Cinebench then we talk on this. He should at-least have mentioned the uarch part. Also on a side note, Apple underselling the chips ? That's really first, since Apple always over promises. Their latest meltdown on the MacBooks with low quality/specced VRM throttling the CFL machines is a joke.
There may be a physical limit to the size of transistors but the limit of computing performance is not ‘what Intel is doing’. There’s more to performance than instructions per second or clock frequencies. In fact these don’t lead to the same performance at all as ARM is RISC and x64 is CISC.