It would be nice if the addon could automatically adjust the "scaling" setting when moving between different resolutions. Most other addons seem to do this (like ElvUI). But currently, when I swap between my 1080p and 4k monitor, I have to manually adjust the scaling setting. Would be great if I didn't have to do this all the time.

Same here. All my other addons scale fine when switching monitors/resolutions, but I always have to change Cell scale and re-position the frames.

I also miss a way to do exact positioning by adjusting x/y position and/or anchoring to a specific frame (like i.e. WeakAuras does), but that's another topic.

Yes! It happened. Thanks @enderneko!

https://github.com/enderneko/Cell/releases/tag/r246-release

Cell now scales with UIParent.