Have you noticed that in the mobile domain the use (not necessarily the popularity) of operating systems from different companies is exactly the reverse order as on the desktop!? Leaving RIM and Symbian aside for the moment as these OSes are not present on the desktop the order is as follows:
- Linux, known as Android from Google
- iOS from Apple
- Windows Phone 7 from Microsoft (with a huge gap to the second one)
And from what can be told today, I don't think this order is going to change anytime soon, neither in mobile nor the reverse order on the desktop.