Re: [w3ctag/design-reviews] Physical and logical resolution for screen-capture MediaStreamTracks (Issue #1060)

christianliebel left a comment (w3ctag/design-reviews#1060)

@guidou, thank you for your contribution. We believe this proposal addresses a valid use case and represents a minor addition. While it slightly increases the fingerprinting surface, this concern is minimal since users' screen contents are already being streamed, and the pixel ratio could be inferred through comparison with known elements like window or system controls.

However, we have two remarks:

1. The term `devicePixelRatio` is typically used to denote the ratio between physical and logical pixels. Introducing `screenDisplayRatio` may lead to confusion. We recommend using established property names to maintain clarity and consistency.
2. The proposal currently lacks an event interface to handle changes in pixel ratio. For example, if a user adjusts the pixel ratio level during screen sharing (such as zooming in or out on a shared tab), the overall size remains the same, but the pixel ratio changes. Without an event interface, these changes cannot be processed.

Please let us know your thoughts on these two points.

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