Yes if done correctly a automated testing can do all of that. I think there is a reluctance in the games industry to do automated testing, be it because of the tight deadlines,laziness or ego’s the uptake on automated testing is simply not there. People were shocked when I told them all of 1944 has automated tests.
That said its not a substitute for an actual tester, but rather it helps them in allowing them to do far more tests in their working day, while the Automated tests work towards ensuring that existing test cases are functioning correctly. (Yes all of this was drilled into me at Ericsson’s and I live by it now)
I would assume it is more likely that open beta’s will be the new way to test. Where a partial product is released and everyone can grab it and report bugs.