Microsoft Demo: Feeling Touch Latency Down to 1 Millisecond

HN commenters cite it whenever input latency comes up, as the demonstration that people can perceive touch delay down to 1 ms.

A Microsoft Research demo from TechFest 2012 of a lab touch system that lets viewers feel the effect of different input latencies, down to about 1 ms. It shows how much more responsive dragging feels compared with typical 100 ms touch delay.