The more human interact with robots. They will form a connection to their robots..And as these walking, talking, machines more human-like these connection will become similar to relationships between human. People may become more comfortable interacting with robots, which could lead to less social interaction between humans.
Your person robot might be designed to never argue, console you, understanding, know what to say at the right time, even feed you ego.
Some may view the robot as more supportive and more caring then their human counter parts. May even proclaim they are in love with a robot