Few of us doubt that, at some point, we will all be driving battery-powered vehicles. Will teaching and learning in higher education move from mostly a face-to-face activity, to one that is mainly done online? This shift from residential to online learning is occurring rapidly at the graduate education level. Of the approximately 3 million graduate students studying at US institutions, about one-in-five are studying exclusively online. (About twice the proportion of undergraduates who are only enrolled in online learning).