The Steam Link app for Quest introduces notable enhancement in visuals through the use of supersampling. - Road to VR
Steam Link for Quest Brings Significant Visual Improvement Thanks to Supersampling
Valve has quickly released patches to improve the recently updated Steam Link function for Quest users. The new update includes "Advanced Supersample Filtering," which enhances the quality of wirelessly streaming video when using high supersampling rates. This improvement will be particularly noticeable for users with powerful gaming rigs. However, the feature is available for resource-intensive games like Half-Life: Alyx. For more information, users can visit the source, Road to VR.
Source: https://www.roadtovr.com/steam-link-supersampling-update-quest-3/