I love the movie poster acoustic panel idea.

Not really what your thinking about, but I'll throw it out there anyway - how about some big soft fuzzy bean bag chairs. They help acoustically deaden a room and are kind of fun and comfy to fall into when just playing a video game or casual watching. We have 3 big ones for the kids (1 each). Makes for a neat room feature, plus they can easily be moved anywhere in the theater or house.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1