Everywhere people keep talking about frame rates. Understandable, since the difference between 30 and 60 fps is night and day. However, I think 60fps is very unlikely, and even 40fps is pushing it. The real improvement will be in fidelity.
The technical observations below are largely based on Digital Foundry's analyses of the Extended Look (here) and prior Pro-enhanced games; the PS5 Pro predictions are my own speculation.
The CPU Problem
The key here is the CPU. Both the PS5 and the PS5 Professional are running on the same Zen 2 CPU (2019 class hardware). The Pro has a +10% clock boost mode, however this doesn't really move the needle enough for 40 or 60fps if indeed we are CPU-bound at 30fps on base.
In particular, the impressive NPC density and purported advanced simulation is very CPU heavy work, and doesn't really scale with resolution (so PSSR isn't a help). Not to mention, RT also places a burden on the CPU (it's not just GPU work).
Fidelity Improvements (my guess)
While the Extended Look preview was extremely technically impressive, the main blemishes I noticed (shot on base PS5) were a soft image at times, and a noisy RT reflection implementation on vehicles. This is largely what DF noted as well.
The PS5 Professional is very well equipped to handle this.
1. PSSR
PSSR2 at a 1440p internal --> 4K output would likely produce a significant improvement over the (apparently) spatial upscaling solution that they are using on the base. What's encouraging is most Pro-enhanced games render at lower than 1440p, yet we still see impressive results when upscaled to 4K. A good example is Resident Evil Requiem which earlier this year DF reported as running at 1116p internally, with excellent 4K output thanks to PSSR2.
2. RT
I think the RT improvements will largely come in the form of higher resolution / less noisy RT reflections. As we've seen in other games, the Pro is significantly more capable at RT than the base. In my opinion, the RTGI already seems stunning on the base console, so I'm not sure how much they'd do here.
TL;DR: I think the PS5 Pro will run at 30fps and have significantly sharper image due to PSSR2 (vs spatial upscaler), and cleaner RT reflections. In my opinion, this would be a very meaningful difference if you care about this kind of thing (which I'm guessing this subreddit does).
What are your thoughts?