My intention was to find more examples of this for you - NO luck - or to make up some examples but that didn't happen either. Soooo... You'll just have to use your imagination and try to visualize the concept.
I'm definitely not advocating that everyone start slapping curtains on every wall that doesn't have windows, but I think it can be a great idea for certain spaces. For example: Look at the image above and imagine instead that this is a large windowless dining room wall that's been driving you crazy. The walls are painted in your favorite color and the curtains have been changed to ones that work with your color scheme (high contrast with the wall if you want them to stand out - neutral or close to the wall color if you want them to blend and just provide softness and texture). The console table here has been swapped out for a buffet. Are you getting the picture? Am I crazy? :-)
Can you think of anywhere else you might use a wall curtain, or is the idea just not for you?