http://www.google.com/trends?q=ubuntu

This has been my 'go-to' for Ubuntu popularity over the last few years. Now it seems the last time it was this unpopular was way back in 2007.

Maybe it's because Windows 7 perhaps leapt ahead in usability, and the whole infrastructure of Linux is fading into obscurity, to be replaced by things built on top, like Android and Chrome OS. I admit, the last time I used Ubuntu on my machines was over 2 months ago.