Reggie;
What does the computer do when it doesn't get a standard read back? How about when the pilot doesn't do what you tell him or her to do? I've been involved in a LOT Of testing of "new" equipment and nothing is out there yet that is going to replace the human anytime in the near future. Computers don't do the unexpected very well. Also take a look at AMASS and see all the false alerts it generates as well as some other technologies that work some of the time... We run things a bit to close for them to work some of the time. If we spaced things out so that the computers on the ground and in the aircraft could handle things, the airlines would surely go bust with all of the extra delays.
regards
Scott