Yeah, also don't forget PS5 are using RDNA 2 . RDNA 2 has gain more IPC performance then RDNA 1 (RX 5700 variant) . You need to consider that. On top of that PS5 has a lot and a lot of customization that is hard to compare directly.
You also need to check 2019 leak of PS5 dev kit "Gonzalo " benchmark that exceed RTX 2070 by far and on the realm of RTX 2080 performance . https://bgr.com/2019/06/26/ps5-specs-vs-ps4-benchmark-leaks-teases-massive-performance-gains/
That was using old GPU on the old devkit
Yea I can certainly see it being faster than a 2070. It's things like Ubisoft saying AssCreed Vikings will run at a minimum of 4k 30fps on Series X and MS comparing Series X to a 2080 instead of like 2080 Ti with Gears 5 benchmark that has me doubting some of the claims when it comes to the GPU performance. Now neither of those are 100% solid obviously since we won't know how they will actually perform and look when they come out but it does give me reason to doubt.
I am not saying that ps5/Series X can't do it but I am going to need to see more upcoming games and how they perform.