This is true, but it's worth noting that 3x was 5ms additional latency beyond original FG and 7ms for 4x, so the difference in latency between DLSS 3 FG and DLSS 4 MFG is probably imperceptible for most people.
I'm guessing users will self tune to use 2x/3x/4x based on their v-sync preference then.
So Nvidia's example of taking cyberpunk from 28fps to 200+ or whatever doesn't actually work. It'll still feel like 20fps sluggish watery responses even though it'll look smooth