Games typically need only access to video adapter, sound card and maybe network. They do not need access to your browser's cookies or history, or documents folder, for example. This probably doesn't require using VM.

> They do not need access to your browser's cookies or history, or documents folder, for example

Well, some do... like Doki Doki Literature Club

I would think it would work in practice closer to mobile apps, where their access requirements are explicitly stated upfront (eg: needs access to documents folder).

Yes please. Still most apps don’t need access to the documents directory or the camera.

They want to “open a file” which’s means file open dialog

Or: upload your profile picture, which’s means a one time upload of a file. Right now you give access to the camera and it can be used for anything