In what is presumed to be paving the way for better support for the cloud gaming version of Steam, Google released version 101 of ChromeOS for the developer channel (not public use recommended).
A highlighted novelty is a preliminary version of support for Variable Refresh Rate or adaptive image synchronization for ChromeOS users, and although it seems to be functionality for external monitors connected to Chromebooks, it is possible that it can work on the native monitor of ChromeOS computers.
It is known that the high-performance Chromebooks currently available are still with integrated chips, but a future is foreseen where AMD and Nvidia take computing and begin supporting Chromebooks and Chromebox.
For developers who are going to test, the capability is not visible in options, but through chrome://flags