Mice have supported 1KHz since the 90s; They are merely set to 125Hz by default. The problem is some can handle low sensitivity and some cannot (due to slow sen

Mice have supported 1KHz since the 90s; They are merely set to 125Hz by default. The problem is some can handle low sensitivity and some cannot (due to slow sensor sample rate afaik): http://www.esreality.com/?a=post&id=1265679 http://www.esreality.com/?a=post&id=1265679. This of course is no different than the "gaming" mouse market. Some can handle fast movement, some cannot. 4ms latency is basically nothing (Relatively. Yes, it should be zero). Games already add 10s of ms, modern monitors all add around 3ms-10ms for no reason at a bare minimum. And the latency of each pixel varies depending on the start and end luminance level of a pixel moreso than the [0,8] ms of a mouse at 125Hz being sampled at an arbitrary position in your game cycle (yes, even on many "240Hz" LCDs). Though, it's unclear to me if you get other undesired effects from resampling the output of already sampling the mouse. 1KHz+ mouse sampling's primary benefit is that panning is smooth (perhaps on a properly configured system with a CRT and non-bloated stack then the 8ms max latency becomes an issue). If using a 125Hz mouse polling rate, you circle around an object while keeping your crosshair it, it will be easy to see how wobbly this is. At 1KHz that mostly goes away. Higher mouse DPI on low sens additionally visibly adds to the smoothness.