It is in many respects nebulous, but that I think is because it's not quite a discipline. It can't quite mark out it's domain and jurisdiction in the way a traditional discipline might, and that's in large part because the transformation in cultural practices -- economic, analytical, subjective, etc -- that the advent of computing, software, and big data is generating is so momentous. It will require a transformation of the basic assumptions that lay at the base of professional training in the humanities all across the board.