Choosing a traditional pattern of wallpaper may lead to a traditional design. Or perhaps the traditional wallpaper becomes a soothing backdrop to a more modern design. If the furniture of the room is preexisting the choice of wallpaper can change how the decor relates together. A room that was previously highly traditional can become retro chic with the additional of unconventional wallpaper and furniture covers.
A new design style begins with the background. Having a pattern created with black and white will break up a room that is filled with solid colors or a monochromatic scheme. Have fun with pattern on the walls can be done in ways that wouldn't work on a specific piece of furniture. You can have your furniture blend into the wallpaper by sticking to black and white pieces. Or your furniture can stand out away from the wall with the use of color.