The two technologies are not at the comparison as ARM is just getting entered in the the PC segment, and it will take some time to get matured there and then it will take its ride on the server segment, as the server segment is more time and mission critical where as domestic PC segment is not that much time and mission critical.
Dileep continues to speak plainly and clearly. Sort of refreshing. According to The Linley Group, Dileep was giving his talk as a conference keynote entitled "Engineering Efficiency in Data Centers"... just the kind of topic where an ARM fanboy would want to hear good things about processor extremities. Dileep is reported to be a Distinguished Engineer, Global Foundation Services at Microsoft.