Control of a massive contingent of robots (e.g. service robots, teacher robots, etc.) and connectivity to the world’s home and building automation systems, robot factories, self-driving cars, and so on and so forth.
If you have all this then you only need mildly intelligent systems to do a lot of good.
Link: Ben Goertzel dismisses Yudkowsky's FAI and proposes his own solution: Nanny-AI
Some relevant quotes:
Apparently Goertzel doesn't think that building a Nanny-AI with the above mentioned qualities is almost as difficult as creating a FAI a la Yudkowsky.
But SIAI believes that once you can create an AI-Nanny you can (probably) create a full-blown FAI as well.
Or am I mistaken?