I still don't know what to think. He might be telling the truth and this is a one time thing or he doesn't know or it's just PR talk and all PS releases will be on PC from next gen on.
It's just experimentation I think. Like with PS Now and their timed games.
Doing this now gives them some data to work with in case dedicated hardware ends up going away. They'll be able to make swift moves to initiatives like PC.
I also imagine the PC performance will be what the PS5 patch will be.