I've been mega impressed with FG on the 4080 in geforce now. Pretty much what the youtubers etc. say is true though, your base fps needs to be 60+ fps in order to get a good experience surrounding not noticing latency. That's why FSR 3 for consoles will not be a big deal as they would be playing base of 30 fps, unless amd have somehow managed to beat nvidias workaround to deal with latency all through their magical drivers.
It really is game changing tech though, people who say it's just tv motion interpolation and the usual nonsense of not being anything new have clearly not used/seen it for themselves.
Can't wait for dlss 4 and the 50xx series now