http://www.bbc.co.uk/news/magazine-21623892
This is an excellent article that covers a lot of subtle ground about the state of integration of robots into our social space. It's worth a couple of reads and some followup.
http://www.bbc.co.uk/news/technology-17387854
This related article moves in the opposite direction and relates some anecdotes about just how far we have to go before this kind of social interaction will be comfortable.