So lets say that Naughty Dog were given the task of converting to a lower powered console with less disc space?
How would they fit say 50GB on a DVD, handle a processor with less cores and less power than their target one?
Put it this way, Sony owned IPs are written for a computer using a Cell processor using CellOS, low level graphics calls not related to other systems, a certain memory model. So a Window OS using DirectX will be a LOT of work.
Exclusives are where any console shines