Automated test can not replace manual testing, in fact, the positioning of the two tests are different. Automated testing is to return, while manual testing is to explore. Once the exploration part of the test begins to become routine, it can be written to automatically execute automated test cases subsequent return, and let the testers to re-enter more creative testing.
Automated systems can not replace automated test unit testing. It can be seen from the front of the four-quadrant, system testing to help products, and unit testing to help development teams, different positioning and value orientation of both.