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Those are video framerates, usable for slowing down things like jumps to water / with skis etc. No screen for general public has 7k+ framerate, would be completely useless waste of energy (and money for expensive research)

That high FPS mode will be at a tiny resolution and need tons of light. Still interesting of course.

Edit: I stand corrected it’s still 720p

At what point is it no longer noticeable?

120fps

Erm, the numbers he/she is quoting are video framerates

Very early, but that's beside the point. The point is one can make a slow-motion video out of a high-fps one.