It has been pointed out that Steam hit 5 million simultaneous users this morning. That's a new record, set with a substantial margin. Last September Steam set its previous record with 4 million users online at the same time. Comparatively, for the sake of fan-boy arguments, the highest number of concurrent players on Xbox LIVE was 3.3 million users on November 8, 2011. Of course, these numbers don't account for all PC gamers, just those on Steam at that moment. A breakdown reveals that the most pl...