Maybe you collect antique rugs, or maybe you want to add more texture and pattern to a wall than wallpaper can provide. Consider these examples of hanging rugs on walls:
As we go into the cooler fall season, rugs on walls can also provide warmth to a room. If you fall in love with a really old rug that just wouldn't hold up on the floor, this is a perfect way to bring it into your home anyway. And one more plus: unlike wallpaper, you can take it with you when you move.