He's basically saying that the developers do a poor job of porting (and optimizing) games to the PC from the consoles.
That's the gist of it,but no.
The developers USED to do a poor job of porting (and optimizing) games to the PC from the consoles back when consoles didn't run on x86/64 yet.
Nowadays they don't even port, it's exactly as I say they reduce our desktop cores to nothing more than jaguar cores,we run the exact same code that is made for CPUs that are extremely more "narrow" IPC wise.
Here is a recent example,BF V the part that is loading the game up is different due to consoles not using windows so we got one single thread using up about 1.60 IPC while only using up 1.6Ghz of cycles.
Now, in the game with 3 worker threads plus driver plus anything else the game only uses up 0.60 IPC while using 3.1Ghz,that's almost one third of the IPC of the single thread at almost twice the used cycles...
(Yes the previous one would be 0.80 at ~3Ghz cycles but it's still only one thread against 3+ )
The cores get reduced to jaguar levels,there is no other way to spin this.
PCM is a official intel tool to measure the amount of IPC that get's used by your CPU.
PCM (Processor Counter Monitor)
Intel site for info
https://software.intel.com/en-us/articles/intel-performance-counter-monitor
Github for downloading.
https://github.com/opcm/pcm
Edit: typos and descriptions