It was mentioned previously a year ago also.
The custom “masonry gallery bric” provided as part of the developer api uses “columns” if I recall correctly. With that, in the appearance sidebar you can add/remove images so the basic integration of using and interacting with columns has already been proven in app and the UI.
So I would think it would be possible to have a generic column bric and allow the column settings to be set via the sidebar. Allowing users to drop in various content visually and adjust settings. But only @norm could conclude how that fits in the scope of the app at its present state.