This is a fascinating idea. I think much would depend on how people experience audio. I would wager a massive amount of people just use their TV's average/lacklustre speakers and have never experienced good audio, whether through a separate audio system connected to their TV or a really good set of headphones.
That said, RT is not setting the world on fire either and I wonder if part of that is because game developers have got really good at faking lighting. I'd similarly wager that most people don't care about accurate (RT) lighting, but they want atmospheric lighting.
Nonetheless this kind test would be really interesting to watch observe.
I think the opposite is true regarding ray tracing. Just seeing the popularity of the minecraft RT reviews and subsequent comments is what seems people are really thinking is amazing, same for Metro exodus, CP2077 or even the RT implementations in rift apart, gt7 etc. The SSD has gotten alot of attention too (faster loading) so does reconstruction tech (performance improvements).