Just last week, I began taking a Tangible Interfaces course under the legendary Hiroshi Ishii, head of the Tangible Media Group at the MIT Media Lab. We spent our first class period learning about the concept of "ambient interfaces", products that augment an environment by unobtrusively conveying information, often with abstract visual representations. Many of the concepts created by those in the Tangible Media Group are endlessly fascinating and beautiful.
During our group breakout sessions, we needed to develop as many concepts as we could that could be designated as ambient. One idea that I'm particularly interested in is this "See Me Outside" concept.