I don't know if the robots can change the world for better but I think that the robots can help the grandomthers and the grandfathers who live lonely.
Someday all the people have to work with a robot but I prefere work without robots because they are more intelligent than us and they take humans Jobs.
The risks of this robots are: they can steal jobs, they can turn against us, the systems can fail,...
I'm not optimistic or pessimistic because I think that we need to change the world for better and robots can help us but I'm scared because the systems can fail.