I'm not convinced of the prospect of a PS5 Pro.
I reiterate my previous argument on the matter...
How do they market the thing?
PS4 Pro, was positioned around 4k.
PS5 will render 4k natively, with performance to spare*.
The jump to 8k from 4k, is much less evident on a max. 50inch screen from typical viewing distances. You're well into diminishing returns there. Sure TV manufacturers will be heavily marketing 8k TVs in 2023+, and 8k TVs will become standard shortly afterwards, but from a game development point of view, with increases in performance slowing with a slowdown in Moore's Law, is it really prudent to waste so much of your processor performance on 8k rendering when you can just pick some sub-4k resolution and checkerboard to get results most mainstream gamers won't recognize as different?
To throw another log on the 8k fire, even with the 1080p to 4k transition, it can be said that, arguably, HDR was a bigger deal than the actual 4k resolution was. So if we accept this, 8k/HDR from 4k/HDR on a 32-50inch screen an at typical viewing distances isn't going to make people want to run out to buy a PS5 Pro.
So if not 8k, then what becomes the PS5's USP? "Moar powa!" alone simply isn't enough.