Does "Linux" include Android and ChromeOS? One of my relatives got a Chrombook. two others got Android tablets. Other family got two new Android Moto G smartphones. Out of say 30 people I don't know anyone who got a new windows phone, tablet or desktop.
I got a surface pro 2 and am very surprised at how much I enjoy it. Playing games like Myst off of Steam blew me away. And this might sound crazy... but IE 11 is my default browser. Chrome is almost unusable on it but IE works great. Again, Very Surprised at how awesome it is.
It's a tablet size computer, NOT a tablet sized phone.
I haven't tried a Metro version but the latest FF in desktop mode doesn't have support for basic touch screen gestures, and doesn't support the stylus. Same with Chrome, but Chrome will outright freeze on pages that so far looks like some weird scroll configs (gmail after opening a few messages freezes)
IE 11 has at least basic gesture support, pinch-zoom, gravity scrolling (whatever its called). But what I really love is using the stylus, and IE treats that as mouse input, so you get hover, click, etc..
The Wikipedia page summarizes the data from Net Applications (the data source for the article), Stat Counter and other popular sources. They break out mobile separately, but as for Chromebook, the numbers I've seen are very low (< 1%), so it probably gets lumped in the "Others" category.
The Network Applications page from which TFA claims to have gotten its numbers is titled "desktop operating system market share", so I'm guessing Android is not covered (though Chromebooks might be).