I would personally have much (Blockland related) use for them and I believe the community would also benefit greatly from this. My intentions would be to import the interior 3D models to Blender and create skyboxes from them. Those skyboxes could then be used in Slates to create the illusion of an interior and also as an homage to the olden days of Blockland. I could very easily easily create several skyboxes from a single map. For example on the Bedroom floor, on the bed, on the drawer, inside the bed and so on. I see this as something the community would like.
I personally would love a slate map which (if possible) had the feel of walking on an infinite field of Bedroom Floor.
And the sky would look like an infinite Bedroom Ceiling, the walls in the image of Infinite walls.
I don't quite know how a poster or door or window would look as a skybox texture, but I'd be happy with just the walls.
And then it'd be awesome to change that floor texture to look like the inside or top of the bed, or a shelf or the roof of the Bedroom.
You could have a map that recreates that atmosphere of the Bedroom map and maintain a really traditional feeling of Minecraft.
I don't know if any of that is even remotely possible, but I've got a picture in my head which I just love at the moment.
Just imagining myself as if I'm absolutely tiny in the Bedroom and the bed underneath me goes on forever no matter how far I walk, or I can never travel far enough to reach the corner of the room.