He actually used an iPad during his set in Brooklyn earlier this month. I was under the impression he used it for his tabs or setlist.
It seems kind of weird to use it for anything on stage that's not using it for some kind of instrument/sampling thing or something... I'm sure he was just playing Angry Birds.
Haha that make me laugh as I try to imagine that being the type of sound that the next Thrice record will portray. Nevertheless a very good Christmas song