In many ways, Hearthstone is absolutely tailor-fit for mobile gaming. It requires minimal manipulation; poking, holding, and the occasional swipe is about as complex as the physical mechanics get. It's a turn-based thinker's game that gives you ample time to plot your strategy and get a few other things done between moves. On an iPad, that's pretty easy; I would read a book while my opponent took his/her/its turn.
The game actually kept me up past my bedtime because of the "just one more match" temptation, which tells me that the magic that fueled my interest in this game in beta is roaring more now than ever. But how does it actually handle on Apple's devices?