I'm willing to bet the mortgage, the baby AND the bath water, that things will be very different by the time he actually hits the workplace. My particular students, for example, are interested mostly in desktop publishing, graphics design, mulitmedia and web development. The ones who are doing internships in related local businesses have found themselves all working on Macs. I would be doing them a disservice by not exposing them to the mac platform. Different programs, different needs, different platforms.
Life goes on.