I am in favor of the idea of individual instruction and customizing content to the reading level of the student. Obviously, that's not possible with traditional class sets of texts, so technology is useful in this scenario. However, I cringe when I hear a teacher say "you get to choose a math app." That's not really offering a choice, and even worse, the content is devoid of context! Of course, this may just be a reaction to the "drill and kill" type apps they showed, but I think that's probably a pretty common implementation model for many teachers.
The point of this is that unless and until we overhaul teacher training and professional development, and radically change the model of learning, the gizmos and gadgets are simply going to sustain the traditional model of "delivering instruction."
We can do better. But it starts with student-centered learning, not with technology.