Good Questions: Ideas for Living Room Wall?

Hi Apartment Therapy, I could use some help deciding what to do with the empty wall behind the television in my living room. I will be having family and friends come to visit me in NY this summer, and I would like to make this area more inviting and less industrial-looking before they arrive. Everything that I have tried so far has fallen flat. For context, I am including two shots of the rest of my living room (in addition to a shot of the offending wall). I tried to stick to muted colors and clean lines, but maybe I should consider something more dramatic? I am open to — and would greatly appreciate — any suggestions.Thanks so much! Heather

Who can help Heather finish her living room? — she's almost there!