I've seen some exaggerated titles but this one is something else.

It's definitely good frame interpolation, but not only does the slow-mo already look artificial at a mere 4 or 8 times slower than the original it also does nothing to reduce motion blur, which makes it incapable of replacing a high speed camera in any meaningful way.

I guess they may have meant that it can also improve images that come out of a 300k FPS camera, but that's a somewhat meaningless statement. If anything more FPS makes things easier to interpolate.