HBO just announced that the HBO Go on-demand service will be coming to the Xbox 360 on April 1st, just in time for the second season of Game of Thrones. Although we heard back in October that HBO Go was on its way to the console, we'd not heard any word of a launch date until now. To use the service, you'll need to have a subscription to HBO, and have downloaded the latest dashboard update. HBO Go joins a growing list of TV services available on Microsoft's console — Comcast, Verizon's FiOS, and Hulu Plus are either coming soon or already available — making the Xbox a serious contender for your cable box's space under the TV.