With all the bad news about Windows 8 these days, this should help put things in perspective: After just four weeks in the market, there are already more people on the popular Steam video game service using Windows 8 than Mac OS X. What’s interesting to me is how differently Steam’s Gabe Newell has treated Mac OS X and Windows 8, both of which offered closed app store platforms that ostensibly compete with his own service. Back in 2010, when Valve launched Steam for OS X, Newell noted that Steam was “transitioning from entertainment as a product to entertainment as a service” and that