With RT on ultra and pretty much most set to high, I sit at roughly 55 fps roughly on a 2080Ti, which I was massively impressed with. There was a mission with so many people around, I had to turn RT off, as it was dropping to 15 fps at time but even with it off, I still got drops to 20 fps. The game does look sweet without RT in truth but with just makes me smile. I am old (50 next week), so maybe coming from the Amiga days and seeing the potential for RT back then, I am a little biased towards it but it is a game changer to me.
I don't doubt that it's the next big thing at all, I just want to see something powerful enough to be able to run it at native with everything maxed out in all it's glory.