Intrinsic on 26 November 2018
It depends on chip fabrication.
It took 4yrs to go from 65nm to 28nm fabrication. And 6yrs to go from 2nm to 14nm. And about 4yrs to go from 14nm to 7nm (assuming there are no surprises).
And these node shrinks are getting harder and harder with each passing shrink (just ask intel).
The Pro and X models are a by product of such a node shrink. If in 3-4 years after the new consoles are released we have a shrink from 7nm to say 4nm then it will be possible for them to make consoles about twice as powerful for around whatever it cost them when the consoles launched.
If it takes 7yrs for that node shrink to come? then that will be PS6 we are talking about.
