Those aren't robots, they're inanimate objects. Animate robots are often treated like living beings:

http://spectrum.ieee.org/automaton/robotics/artificial-intel...

http://www.newsweek.com/japans-robot-dogs-get-funerals-sony-...

Maybe nanny is a bad example. I'd pay good money to get impartial therapy from an AI (guaranteed non-abusive) and then when it comes to solving the problems of humanity in general, a sufficiently smart AI seems like our best bet, on the basis that human nature is yet to be fully understood by humans after centuries of trying...