WebGL is fine.
From this page, Atom N450, Xubuntu 12.04, Xorg 1.11.3, Firefox 24: "Hmm. While your browser seems to support WebGL, it is disabled or unavailable. If possible, please ensure that you are running the latest drivers for your video card." This Mozilla page recommended looking in the "Additional Drivers" utility that came with the operating system, but all it showed me was the driver for a Broadcom NIC that I'm already using. The Mozilla page also referred me to Intel's driver update utility, but that's Windows-only.
Because it ships with a gamepad and has a case designed to fit in next to a television.
Neither of those is terribly remarkable in this day and age.
If you'd believe an Anonymous Coward's side of this story, then shipping with a gamepad and being marketed for use with a TV are remarkable because they are beyond the lowest common denominator for PC gaming. Is this AC right or just full of crap?
Linux distributions have distinct names
Listing all Linux distributions in an application's "system requirements" would require excessive space. This means there's a need for a precise name for the set of Linux distributions that support Gtk+ and/or Qt userland as opposed to only the Android userland. Would Qt/Linux or Gtk+/Linux be more accurate?
GNU/Linux is a term that should be universally rejected
It's still far less clunky than "Linux-with-a-GNU-userland" or "Linux-that-isn't-Android-or-embedded".
If you must err on the side of brevity, GNU/Linux is best
I need brevity because there are plenty of Slashdot users who repeatedly point to Google Play Store as evidence that there are plenty of games and other commercial apps "on Linux". So is there a shorter term for Linux-based systems that aren't Android or embedded?
The "it" you are referring to doesn't need to be referred to at all.
It does when "free Linux-based OS with a multiwindow GUI" takes up the majority of a 50-character "Comment Subject" box. You need the "multiwindow GUI" part to distinguish the multitude of Linux distributions for desktop and laptop PCs from Android and from Linux distributions designed for servers.
In seeking the unattainable, simplicity only gets in the way. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982