https://arstechnica.com/gadgets/2022/01/500-hz-pc-monitor-prototype-is-fastest-panel-ever/

Monitors with high refresh rates are able to depict fast-paced action more smoothly than standard 60 Hz monitors. Today's screens can go as high as 360 Hz, but BOE, a Chinese electronics company, is working on increasing speeds to 500 Hz. And it has the prototype to prove it.

Today's PC monitors typically use a thin film transistor (TFT) array made with amorphous silicon, the same type of non-crystalline material found in products like solar cells. According to a report spotted by Tom's Hardware and Wccftech from a Chinese publication on Sina.com, BOE, whose business includes making display panels for smartphones and tablets for the likes of LG and Apple, has been working on making it more efficient to replace the silicon TFT active layer with an oxide TFT one, allowing the company to make a monitor prototype that can refresh 1920×1080 pixels 500 times per second.