Steam is a pretty bad place to see the general state of the market - we're talking about a highly self-selecting demographic of users (read: core gamers). - St

Steam is a pretty bad place to see the general state of the market - we're talking about a highly self-selecting demographic of users (read: core gamers). - Steam supports MacOS, but the title selection is somewhere between "very poor" and "nonexistent". You will see a dramatic under reporting of OSX usage numbers compared to the actual market. - Most games no longer support WinXP, so any regular Steam user would have been forced to upgrade to at least Win7 long ago just to maintain compatibility. You will also see a dramatic under-reporting of XP numbers here. "Steam users" is not a representative selection of "PC market".