Comment Which "Linux"? (Score 1) 768
Linux isn't a popular gaming platform because it lacks capability or features to support great gaming. It's not a popular gaming platform because game developers can't economically support the myriad of Linux distros in a way the consumer expects to be supported. Supporting even the "most popular" or "most common" Linux (however you want to define it) is a developer death by a 100 paper cuts spending time, effort and money fixing all the little edge cases.
Mainstream consumers want to "get Linux", then "play games" that "just works" not fiddle around recompiling source code or waiting for a package maintainer to get around to creating the package for their particular strain of Linux only to have it stop working 6 months later when the next 0.0.0.1 release comes out of Linux Distro XYZ. Imagine waiting two weeks for a yum update of you favorite MMO game client while everyone on Windows simply clicked an icon the moment the game update was released from the developer, the game updated itself auto-magically and connected and you were playing that evening.
It stands to be seen how well Windows 8 actually turns out as a gaming platform, but, from a veteran MMO developer's perspective, Windows has been a dream to develop, distribute and support games for compared to Linux. Windows prior to Win8 may not have been open source but it was open in the way consumers and developers care: you could build and distribute anything you wanted without approval from anyone.