Self-testing is not going to be the wave of the future. Self-testing allows for to much cheating and lying to be affective. There is no form of control on self-testing. Self-testing sounds good in theory, but so does the honor system. We all know that has never worked in any school.
I do believe it may be useful to some degree of course, but to say that it is the way of the future is going a little too far. There is a considerable amount of concern that people may have about the fact that if not used appropriately, may give false negative results.