Let's start with the good effects. The good effects is that the company owner doesn't have to deal with people. Some owners don't really have the time to deal with people and some simply don't have the people skills. The next thing is that robots are more efficient. Robots don't also get sick. They don't come in late. And (might be the best thing) they don't gossip around. They are also more accurate than humans because sometimes employees are dealing with personal problems and/or their emotions and just let errors pass them.

Since robots will be "replacing" human jobs, then humans are going to lose jobs. The economy would be a little unbalanced because there would be a lot of people losing jobs and then the job that will be in demand are robot creation related jobs. Obviously, the creation process of robots will eventually be done by robots as well and the only thing that people will be doing is to think of a new concept. Not everyone's a thinker. Some people were made for physical work and I think that it's one of the ways that the government is balancing us and not really ruining their economy.