Perhaps we didn't read the same article.
I don't understand Chinese and even if I did, I wouldn't feel inclined to believe the claims of one guy in a chinese livestream I've never heard of, over the words of (
the original creator Unreal Engine and CEO of Epic and most probably knows more about UE5 than all of B3D combined) Tim Sweeney's statements claiming he was running a video.
Clearly you prefer to believe this demo was running on a windows laptop based off a reddit post (which you retrieved from the Xbox SeriesX's sub where
there is absolutely nothing against the demo being shown on a PS5 at all) linking to amateur chinese->english translations of some random chinese livestream, and you also chose to completely neglect or misinterpret all the on-the-record statements from Epic developers and their technically-very-literate CEO regarding the importance of a low-latency and hardware accelerated I/O system to make it possible.
Perhaps one should have some disbelief over the claims that a laptop with a RTX 2080
Mobile (a 9.3 TFLOPs Turing GPU) is running the demo no less than 33% faster than the PS5's GPU (40FPS vs. 30FPS), all of Microsoft's Direct Storage stack is most probably still missing and there's no hardware for data decompression... but I guess that's just me.
Regardless, since we're at the point of
choosing to believe which source is more accurate (Epic Games developers vs. a post on a subreddit dedicated to the SeriesX), the conversation has run its course on my end.