I'd be happy to see the Aetheryte functionality automatically come with a house. We don't interact with the item to gain access to its function, after all. But I wouldn't want it removed as a furnishing. It's one of my favorites for creating outdoor lighting effects (there are times I wish I could have a couple placed).

Players would probably end up divided over things like the mail box, message books and orchestrions. Many want them displayed, and they want to be able to place them in specific locations. It would make less sense to have their function separated from their "form".