I'll be getting Windows 8.1 with my next computer build or purchase. Games released this fall (and from then on) will be running with support for DirectX 11.2, which Windows 7 does not have. As I'm a pretty big gamer, I'll want to upgrade sooner than later. Also, DirectX 12.0 comes out next year. I'm assuming the next version of Winblows will also be out by then.