Microsoft has revamped its Games for Windows Live service today, marking the first major update since its debut 18 months ago, and it looks like the company is getting ready on Steam developer Valve. In fact, speaking in a recent This is a smart yet long overdue move considering it already has the dominant PC gaming platform, its Windows operating system, but of course Valve has done a fantastic job at defining the way these distribution services work and Microsoft will have a lot of catching-up to do.