do not believe everything you read.
Do you believe your latest version of xp is hyper thread designed.
so how old is the nt kernel it is bulit on?
Hyperthreading does sound good but all your favourite apps have to be designed to work with it.
And the cpu used for a playstation will be differently designed then your average cpu for your computer. hence instructions have to be converted to be able to work on the different architeture.
this requires the processor to be faster then the processor it is trying to emulate.