[MrEdd]

A fair chunk of casual browsing is moving to tablets running ios or android, and android is really a flavor wrapper on top of linux.

[ShadowAce]

True, but as the article mentions:
It’s not like these are Android or Google ChromeOS users. Those are both counted separately.

[Brookhaven]

Bingo!

Linux will never be a big desktop OS on PCs. Windows and Apple will be the dominant PC OS.

However, as we’re move away from PCs to other devices (tables, phones, etc...) Linux will be a major player, but I’m not sure most users will even know it.

Android is just a flavor of Linux.
Most non-apple tablets run some version of Linux.
The Nook is a Linux device.
The Kindle runs Linux as its Os.

My guess is Linux will eventually become huge as a personal operating system, just not on the PC (and most people will never even know they are running Linux).