It's not just Blizzard's Hearthstone: Heroes of Warcraft that's heading to iPad and tablets, fellow card duel game Scrolls from Minecraft outfit Mojang is also coming to iPad as is being ported over by Ludosity (Ittle Dew, Magicka: Wizards of the Square Tablet, Card City Nights).
Mojang had no further details about the iPad/tablet version at this point in time, but they are also making changes to its big brother that includes a "snappier" tutorial and a weekly reward system.