We should be able to use our extra windup pets as furniture in our player house. That way whenever we get another windup pet from the world bosses, we will actually be able to do something with them other than destroying them like everybody seems to do with their extra windup pets.
Edit: it would also be cool if we were able to interact with them like normal pets when they are in furniture mode (aka pet them and them do their petting animation). And potentially even size them to the size we want the furniture to be.