Full disclosure, I have a 4090. Been using DLSS (non Frame Gen) for a long time rather happily where needed.
But buddy, just accept that it was a poorly done demo that didn't look good. It was rushed(required two 5090s to run, one for the game, one for DLSS 5 to run), the results didn't look good and you explained it poorly.
I don't care if it was geometry informed, the results looked like poor AI generative slop that is all over the internet at this point.
Maybe it'll look great when it's fully baked, maybe it won't. All I know is that it looked bad NOW.