Not exactly true, depending on which sense and , humans can perceive differences down to amounts quite small, even tiny values like 5-10 microseconds for hearing frequencies are noticeable.
For input-visual response time, differences down 0.5-1 milliseconds can be perceived by those sensitive to it and/or trained for it, 2 milliseconds happens to be well above that, though on average 4-6 milliseconds would be an expected threshold without knowing what to expect.
When using gyro-to-mouse input, difference between 60 and 70hz is perceivable, though a small change and not immediately noticeable, often it would be to enough to throw off my inputs for timing-sensitive things should I forget about increasing refresh rate.
Motion inputs often have significantly higher sensitivity to response time variation, adding say, 2msec extra latency into a VR headset and you would be far likelier to end up feeling nauseous after/during use.
Not exactly true, depending on which sense and , humans can perceive differences down to amounts quite small, even tiny values like 5-10 microseconds for hearing frequencies are noticeable.
For input-visual response time, differences down 0.5-1 milliseconds can be perceived by those sensitive to it and/or trained for it, 2 milliseconds happens to be well above that, though on average 4-6 milliseconds would be an expected threshold without knowing what to expect.
When using gyro-to-mouse input, difference between 60 and 70hz is perceivable, though a small change and not immediately noticeable, often it would be to enough to throw off my inputs for timing-sensitive things should I forget about increasing refresh rate.
Motion inputs often have significantly higher sensitivity to response time variation, adding say, 2msec extra latency into a VR headset and you would be far likelier to end up feeling nauseous after/during use.