Hands-off testing. Although the cost of people is easily measurable, any additional value of computer control is difficult to quantify.
Improved professionalism of test organization. This often increases motivation and productivity, and comes with the new discipline and tasks automation requires.
Expansion into advanced test issues. This can occur because of the new abilities to test and monitor that are a consequence of automation with the improved professionalism.
An immediate reduction in perceived productivity of the test organization. This perception is due to a pause in testing while people ramp up, the lag due to installation of automation tools, and creation of automated tests