You might be one of those who scratch their head upon hearing about a thing like living room clipart. And your frowning upon the term is clearly justified. Why would anyone want something like that, something with no clear and apparent reasons to exist whatsoever in the first place? If anyone wants to get a picture of what their living room should look like, one can simply look it up on the net and derive some inspirations for their own living room design. Why in the world would someone rely on a clipart or even search for it to begin with?
For all intents and purposes, a living room clipart is useful in any way you want to see. Sure, realistic images of existing living rooms can give you direct impact on how you should design or arrange your living room but with clipart, you get a sense of fun that comes in the package. This is not something you can find in regular living room images. So, while the idea may seem laughable to you, once you see it from another perspective, the clipart can bring ideas of a living room to you. Do not sell short on something before you experience it firsthand.
A living room clipart can be embedded into a plan of a house construction. If you work as a designer and a client comes to you asking for a plan, you will need a way to convey the idea you have come up with. Stock photos from the net might help but chances are those photos are licensed, which means you cannot use them without permission. Also, they may not be able to channel your ideas fully, only the vaguest part of them. A clipart, meanwhile, is usually free to use and it can effectively help you deliver your ideas to the clients.