I really hate the "fake frames" comments from people, because usually it just means they don't fully understand computer graphics and are listening to loud pundits on why frame generation is the worst thing ever. As I've tried to point out in the review, framegen and MFG aren't inherently bad, but they're also not a 1-to-1 correlation with higher rendered framerates. A really good job at interpolating in between frames may be indistinguishable from actually rendering those frames, so in that sense they can be as "real" as the normally rendered frames.
The crux of the issue is that framegen and MFG aren't using new user input, and are in fact delaying screen updates and adding latency. There's a threshold for latency that varies from person to person. I'm generally fine with anything below ~50ms — probably because I'm no longer a teenager juiced up on caffeine and energy drinks. Someone else might want 40ms or less, and really competitive pro gamers might benefit from sub-20ms latency. I generally won't notice much of a delay or difference between 30ms and 40ms, but 30ms and 80ms is a different matter.
I think we'll ultimately get to a point where Nvidia will sample user input and warp and project frames, as it's doing with Reflex 2, to give frame generation techniques a better feel. And when that happens, people will still find things to complain about. But whether it's fully rendering or partially rendering and generating or something else, all computer graphics are "fake frames" and so it's really about not just the appearance but the feel of the games.
Nvidia is like any big corporation, and it's full of very smart and talented people who strive to create new and exciting things. That's the primary reason the company has been so successful. Basically, Nvidia is competing with itself right now. There are business reasons that Nvidia didn't go nuts with Blackwell, creating a chip on TSMC N2 or N3B with tweaks to optimize it for GPUs, etc. That will be saved for the next architecture I suspect.