IMAX did tests back in the day with footage of a baseball being pitched directly at the camera. They found that the intensity of emotional response tailed off after 60hz. It's not that the higher frame rate isn't perceptible, but that raising the frame rate doesn't really have any appreciable impact unless people expect higher frame rates.

There's a notable difference between passively consumed content and interactive content.

We're fine with 24FPS for films and tv shows, but try that for an FPS and it's considered nigh unplayable. I remember when the line was "the human eye can't see past 30FPS" now it's at 60. The treadmill keeps going.

I know this isn't what you mean.. but I'm imagining someone blindfolded in a research lab testing this out...

Blindfolded person: "I can't see a difference!"