Having recently added a keeping room off my kitchen, I had to tackle that dilemma for myself. With the fireplace in my outdoor room just a small courtyard away, I did not want another one inside. Something needed to be done to anchor the furniture and give the room character.
It was a pretty easy choice to make. Having remarried a few years back, my husband (who graciously agreed to move into my house) had put all of his books in storage. LOTS of books. I had run out of shelf space myself and had books tucked all over the house. While we both enjoy our Kindles, we are really book hoarders at heart! And while a few bookcase accessories are fine, I personally love the colors and interest of books. Again, LOTS of books.
Instead of the conventional idea of having the sofa face the bookcase with a TV within, I chose to recess the sofa into the built in bookcases so it could face out toward the courtyard. This also allowed me to make the art (another husband item in storage!), and not the television, a focal point in the room.
Still wanting more depth, I decided to use a product that worked well for me on a restaurant job I designed in Charleston. Organic and natural, but not rustic, are the banana bark veneer wallpaper panels I had installed behind the sofa. I think it set off the artwork, bookcases and slip covered sofa beautifully.