Perhaps it's easier to conceptualize how to structure classes that are quantitative and that's where the technology will move first. Also, the people with the talent to create the software might have a bias toward the qualitative subjects.
The later will be a much harder problem to solve, but any student who has experienced the feeling of being a few steps ahead or behind the rest of the class would benefit from blended learning in any subject.
The best teachers practice differentiated learning, teaching to a variety of learning styles at once. This is essentially using technology to maximize the human element necessary in teaching and then facilitate groups of students who are working at their own pace to demonstrate learning. Keeps students engaged and holds them accountable.