We’ve only seen one monitor announced so far based on a 240Hz refresh rate VA panel, and that was the Samsung C27RG50 back in June 2019 (yet to appear in retail channels). AOC have now announced that they are developing two new models in their G2 gaming range which will offer this panel technology and refresh rate combination next year. They are the 27″ C27G2Z and 32″ C32G2Z.
Both models offer a 1920 x 1080 resolution, curved VA pane and have adaptive-sync, meaning they can support variable refresh rate from both NVIDIA and AMD systems and accommodate the high 240Hz native refresh rate.
Other specs and details are not released at this time, but the new screens are not expected until 2020. More info when we get it.