What found footage video do you assume to be most convincing? And how do you think photorealistic found footage videos will be made in the future?
There's a youtube account called "mattstudios" who does his own take, and generally spearheaded the "poolrooms" variant of this genre, that is far more grounded and tries to present the concept from the point of view of an everyday guy who "noclips" into it purely by mistake.
for me, this is the best backrooms take, not just for how realistic the video artifacts are, but because of how it captures just a guy recording something on his handicam in 1997 and how he'd realistically act: https://www.youtube.com/watch?v=KenTOGFwLpU
I think the retro look will probably stay as I feel it's part of the aesthetic. But maybe in the future we'll have backrooms-style videos of the current times, and then I imagine the retro/vintage aesthetic will go away.