Thanks for posting the request and the use case. In these cases, it sounds like you’re looking to mix a Variable with a device attribute, is that right?
My gut is that this would likely complicate the UX for ‘normal’ use cases to serve a more esoteric case that’s already achievable with rules. But I’m interested in hearing more about the use cases (and from other community members) as perhaps there’s another need in here.
For example, one approach would be to use a Text or Numeric variable instead of a boolean. Then you could have multiple different conditions that could be aggregated in a rule and then use those in various tiles.
If I remember correctly, the overarching use case was around media and having custom controls that get grayed out. I’ve wondered if there’s a need for more media playback tile variations, but I haven’t seen a lot of requests/feedback in this area (other than volume control). As you alluded to in your other post, Custom Tiles could also be used for this – it could be a great starting point for mocking up a desired tile layout (for someone with the requisite developer skills) and could even be shared with other users.