I've read Automated Insights automated summaries of fantasy football games for yahoo. If that is indicative of their capabilities, then the role of human writers looks to be secure for some time to come.
There are some kinds of stories this can work for - ie, the earthquake bot - but this is not a good general solution. Modern users are sensitive to low-quality content writing as an indicator of product quality. Crappy writing is spam, high-quality writing in an authentic voice is someone worth listening to.
I'm not staking out the claim that this will never be possible, but I've yet to see it executed well.