During the pandemic, many people spent more time playing computer games; The gaming industry saw considerable economic growth. Older PC games saw a recurrence. However, a fully open-source solution to how to play non-online games across the internet is still a no-show.
The browser's implementation of webRTC allows for sharing a window but it does not implement sharing a remote game controller. This is only half a solution.
Parsec was discovered by many people as a solution to online game sharing. It is worth noting that Unity announced parsec as becoming part of the Unity gaming engine in September 2021.