Here is an example of the less is more wallpaper approach using molding. Panel molding is found frequently in prewar rooms, but it also works well in a modern space. The molding serves a dual purpose - it defines a specific area and provides a finished edge or frame. I love this look. It also saves on materials – another bonus.
Taping the design out on the wall beforehand will help you decide just how far or NOT to go. Once up, the overall look is both polished and crisp.
This gives the concept of leftovers a whole new meaning - unused scraps anyone?