In discussing the concept of levels of interaction, Schwier (ED 352 044) suggests that "the transactions (mechanics of how interaction is accomplished) can also be described in terms of their functions and levels of interactivity. Although several transactions can be employed at all levels of interactivity, as interaction reaches for higher levels of engagement with learners, generative transactions are required." The summary also stresses the importance of learner control and interactivity.
So what we are possibly looking at is a change in the concept of a transaction based on the way in which we develop interactive applications.