Sling TV gets HBO and service upgrades just in time for Game of Thrones

UPDATE: The day after this article was originally published, on 4/8/15, Sling TV pushed its HBO option live early. HBO is now available to Sling TV subscribers. Sling TV is taking steps to avoid a repeat of its March Madness woes when Game of Thrones arrives on HBO this Sunday. Sling will start offering HBO on April 11,