There are a lot of ways to give your cat a happy and stimulating environment. Cats are generally happy if you provide the basics: fresh food, cool water, a clean litter box, toys, and an elevated place to nap.
ceiling furniture means doesnt take up space on the floor, but then maybe you need high ceiling for it. plus not all owners will want cats jumping on them from up high and like OMG! get some yourself some pawtastic adorable cat apparel!