This will not happen for a multitude of reasons, and one of them being that users have been just fine with creating threads and waiting for (almost immediate) replied that more times than not help them with their issues. There's also the issue with the staff to user ratio, too many users will want live support, and the staff, although great, won't be able to help everybody at once. That would also decrease activity on the forums to the point where we won't even need them anymore.
If you want quick help, open a thread, even PM a member willing to help you (like me!).
I love your idea, though.