It's probably too early to say whether Massive Open Online Courses (MOOCs) are a "tsunami" or a "seismic shift," but, continuing with the natural disaster theme, the last few months have seen a massive "avalanche" of press commentary about them, especially within the last few days.
Also getting lots of press attention (though not as much right now) is Adaptive/Personalized Learning. Both innovations seem to fascinate us, but probably for different reasons, since they are so fundamentally different at their cores. Personalized Learning, like more traditional concepts of education, places the individual at the center. With MOOCs, groups and social interaction take center stage and learning becomes a collective enterprise.
This post elaborates on this distinction, but also points to a recent blurring of the lines between the two - a development that could be troubling.