A half of a year, almost to the day, passed since Valve removed two dozen employees. Jason Holtman, then Director of Business for Valve, was among those released. Despite the flat-by-design corporate structure, with even game credits listed alphabetically versus title and department, Holtman is considered key to the success of Steam.
Games for Windows has not been a success. Microsoft Game Studios, and even Microsoft Hardware, had high respect in the PC gaming industry with extremely popular franchises and lines of peripherals. Their image has since regressed far enough for Microsoft to give up, two years ago, and roll Games for Windows into the Xbox brand.
As Microsoft fell, Valve climbed. Steam, largely credited to efforts by Jason Holtman, distributes games for basically every major publisher. It has a respected position on the hard drive of gamers which is an enviable feat. The Windows Store has not received any uptake. Microsoft feels the need to change that and, it would seem by accepting the job, Holtman believes he can accomplish that.
I do wonder how Microsoft will be influenced by this hire. The major concern with Windows Store is its certification process and I doubt anything will change on that front. I expect the hope is his contributions to publisher relationships but he might also, on the side, induce change in visible ways.