And computers will not be given complete control with a pilot just supervising what it's doing - the pilots need to continually excercise their skills. I would not want to fly on a plane knowing that the pilots had not flown the plane for half a year.
Computers assist in navigation.
And now the landing guidance systems are neat things too. I personally can't imagine a pilot-less transport catagory aircraft. We have cruise controll, and even prox detectors on some.