The one without any grasp of reality is you. That's because you didn't even care to read my comment properly. Read the part you quote and answer properly before making a fool of yourself.
Let me explain it to you again: It's irrational, because they don't know Windows. They just think they know it. They won't even consider looking at alternatives.
Their PCs are full of crapware and their Windows does not do "what they need".
What they need is a PC that works flawlessly, without slowdowns because 10 toolbars, 10 autoupdaters, 2 antivirus tools, and whatever hog their system.

If they actually knew Windows, their PCs wouldn't be in that sorry state.
Having no clue about Windows and still fiercely claiming otherwise is irrational. Period.

So take Acivision's 5% then.

But it means that PC users could have switched to Linux years ago. Linux is perfectly capable of performing all common PC tasks, from browsing (Firefox, Chrome, and Opera are available) to media consumption to office (OpenOffice) to even web-based gaming. (I'm a lazy user. I am using Linux and would not do if it was not doing just fine what I want.)
For 90%-95% of gamers the PC is not their first choice and yet they'll stay on Windows. Sure, there is the occasional task that can only be done under Windows but these are niches.

The claim that Linux on desktops is only being held back because it lacks games is absolutely ridiculous.
I believe Linux is being held back because of an irrational brand loyalty of the masses toward Windows. Maybe it's some kind of herd behavior.

Learn to read, dude. Win8 is also crappy to use with a touchscreen.

Microsoft is in the tablet market since many years. If I'm not mistaken since shortly after the launch of Windows XP with these UMPC things. Nobody ever wanted tablets with Windows.

Which is why they likely play on consoles without hassles like draconian DRM, driver upgrades, etc.

These days any random mainstream Linux distribution is more user friendly than Windows.

http://www.geforce.com/drivers/results/50195
http://www.geforce.com/drivers/results/50196

No clue. It's just capitalism at work.

Win8 is neither. Win8 is a compromise which forces the users to do some tasks under Metro and others under the classic GUI. Metro is crappy without touchscreens, classic UI is crappy with touchscreens.

No it's not. It's for powerful "livingroom hardware" (probably smart TVs) with Linux as option to run on them. See http://www.gametrailers.com/full-episodes/ncis3o/gt-tv-valve (after 3 minutes). LG is already said to announce a shift from their NetCast smart TV platform to webOS (Linux) next CES: http://www.webosnation.com/gram-working-lg-open-webos-tv

Valve's lower end games (TF2, Portal1, L4D) could easily run on platforms powerful enough for full HD video decoding and playback.

A lot? According to this interview with Ubisoft representatives, only 7% of Ubi's 2011 revenue was generated on PC and 5% of Activision's revenue:
http://www.rockpapershotgun.com/2012/09/05/ubisoft-drm-piracy-interview/

That means that >90% of gaming happens on other platforms anyway (consoles, smartphones) and for those users gaming is not what's keeping them on Windows.
From my experience with Windows users, many have a completely irrational attachment to Windows. They use it because they "know" it and they don't want Linux because they "don't know" it, even though their Windows installations are full of crapware and they could be fooled by any random Linux distribution with a Windows-themed splash screen.

Work still in progress: https://projects.kde.org/projects/extragear/base/plasma-mobile/activity

As if that single option was a requirement by all developers and not a niche...
KDE software is developed by developers and seems like they can live just fine without the option, just like ALL Windows, OSX, etc. developers can since forever.

Thanks for proving my point: It's a feature for a tiny niche audience.

Stability problems in a cutting edge distributions... News at 11...