I'm with you on this one. Someone earlier gave a link where it is stated that another but similar demo was
not running on anything PlayStation.
https://www.gtplanet.net/gran-turismo-tech-demo-real-time-ray-tracing-replay-movie-editor/
This Chris-1515 user has been all over the internet posting Sony patents, not even knowing what they really are about in detail. He's been doing the same thing on resetera and also NeoGAF if i'm not misstaken. And not just photon-mapping, GT 8k videos on 5 to 16 linked PS5's.
This GT video is probably a side-project for PD to show off Sony's new TV line.
Companies go with new patents all the time, especially big ones like MS and Sony. It does not mean they will be used as such though.