How e-ink can reduce visual noise pollution in cities (2015) (futurecities.catapult.org.uk)

Soofa (based out of Cambridge) is implementing exactly that. They're using E Ink's large sized 32" color panels. http://www.soofa.co/soofa-sign/ , http://goodereader.com/blog/e-paper/sofa-sign-activating-pub...