Android Developers created video, which uses maps to show how Google's mobile operating system grew from its release in October 2008 through January 2011. Earlier this month, Gartner reported that Android sales increased 888.8% year over year in 2010.
HTC Dream/G1, the first Android device, was launched in the US and the UK in October 2008 and it became available in other countries in 2009, but it wasn't until the launch of Motorola Droid in November 2009 that Android became popular.
Android Central says that this is "a staggering reminder of just how far Android has come in a relatively short amount of time". Eric Schmidt has recently mentioned that the average number of daily Android activations is now 350,000, up from 300,000 in December, 200,000 in August and 60,000 in April 2010.
This video is what that growth looks like: