On the one hand I think that to test a student's understanding it should be possible to have paper based exams, it's been working for the past few hundred years and society hasn't yet reverted to the dark ages because of it
I can only see an advantage of using a computer based exam if you want to challenge the students more, or if you want to probe a students detailed understanding of something requiring elaborate tables, graphs, or perhaps 3D mathematical models for students of engineering or architecture for instance.
If PC based exams are merely digitized versions of paper based exams and don't add anything new then I think the upgrade is a waste of time. It should be really innovative.