But we do know some stuff. Citing Matt, who is a 3rd party developer:
"You had to work hard with PS3 CPU to get the most out of it. The PS5's IO is just there."
for games that actually leverage it anyway. I foresee a lot of multiplat games not having too much of a difference between versions. maybe one will load slightly faster than the other
www.resetera.com
And he als said that in 3rd party titles there will be some benefits on the PS5, but games won't be designed around it. First party will benefit the most of course.