The thing with doctors is that it is generally easier to bring your body to the doctor's office than it might be to bring a desktop computer to a technician's office somewhere. I realize this isn't nescessarily the case with laptops, but it's more feasible than doctors making housecalls. Also, for a lot of the people I know, it is better for them not to have to unplug anything... ;) Who knows? Maybe technicians will go the way of doctors, working in a central building somewhere with people coming to them.