How literal should interiors photographs be? Is the purpose to show you how you can enjoy the space, or how you could live in it? Maybe it's to show how a kitchen or sofa can fit your room or even the skill of a designer or decorator. Possibly all of these but it's a pretty safe bet to say that it isn't just a photograph of a room.
I have photographed interiors to help sell a property, to show variety of installed kitchens for clients, restaurants to lure in customers and several very high end bars and clubs in London.