Actually thats true. In the post-pc computing era 2013 is the year when Android will have sold more copies then Windows 7. With the post-pc era I'm talking about pc, smartphones and pads merged into one market for computers.
Currently the linux distrubution Android is outselling Windows 7 with about 50%. By the end of 2013 Android will have delivered
more units then Windows 7. In the longer run - with the current sales continuing - we are looking into future a situation where about 3 of 5 of the post pc era computors will be running a linux kernel and most of the others splitting with running Windows and iOS.
Well, unless the linux kernel distributions penetration and market share of sales goes up even more of course.