I was thinking about all the types of wall treatments for dealing with sound absorption.  In short (article coming soon), a room can have hot spots and cold spots where sound either appears super loud or very quiet if standing waves exist due to sound wave reflection. 

Wall treatments such as the foam panels can absorb a percentage of sound and thus reduce or elimination the amount of standing waves and thus remove the hot spots.   Everything I have seen either looked like a carpeted panel on the wall (acoustic panels) or the angled foam that just looks odd anywhere other than in a sound studio.

Then I stumbled on this post about Snowcrash Soundwave Acoustical Wall Panels.  The site linked is a post from someone who installed these panels for the home stereo environment.  While these are for such an environment, I do REALLY like the way they look. I'm usually a function over form type of guy, the design of these panels is really cool. 

FYI, The Swell panel is, "designed to be used as lightweight sound absorbers in the upper frequency range [500Hz and above]."