iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
HBO Shows Now Available in HD on iTunes
Among the shows now available in HD: Big Love, Bored to Death, Carnivale, Curb Your Enthusiasm (Season 7), Deadwood, Eastbound & Down, Entourage (Seasons 3–7), Flight of the Conchords (Season 2), The Life & Times of Tim, Hung, Rome, Six Feet Under (Seasons 3–5), The Sopranos, True Blood
As with most HD content on the iTunes Store, episodes carry a $1.00 premium over their respective standard-definition versions. Most HBO content is priced at $3.99 HD and $2.99 SD, although some shows come in at $2.99 HD and $1.99 SD. The new HD offerings appear to be available in the United States and Canada.