None yet. Most of the 120hz (and occasional 144hz) monitors are of 1080 variety, from 23-27 inches. The lot of them are TN panels with all that entails, except for the rare Catleap Rev 2B IPS that can be overclocked that high. 2560x1440 res, but most cap at around 90-100hz to the best of my knowledge.
With 120hz monitors and NVIDIA Lightboost, there's a hack to increase fluidity and motion sharpness by taking advantage of strobing backlights. This is akin to a CRT and as such flicker fatigue may result from such usage.
You can do something very similar, vendor-agnostic, with certain Samsung 120hz monitors.