"For some it's the status of their portfolio, or the health of an aging
parent. Others want to know if their friends are online, the upcoming
weather, the score of a game, if the fish are biting, or if there's
heavy traffic on their drive home. These are examples of information
that is neither worthy of interrupt (push), nor worthy of investing
time (pull). This type of information should be glanceable, like a
clock or barometer. We call this ambient information, and we've created
the technology to deliver it".
Thanks to Russell Davies for his recent post that got this on my radar.