As reported in its investor presentation, Microsoft's game business brought in $2.29 billion for the quarter, a 39 percent jump compared to the same quarter this time last year. And across the whole year, video games brought $10 billion in revenue into Microsoft's coffers, part of an annual growth of 14 percent in company revenue to $110.36 billion (however, net income did drop 35 percent year over year to $16.57 billion).
http://www.gamasutra.com/view/news/...ion_in_games_revenue_more_Xbox_Live_users.php