yes they sure can, they never sleep or take holidays and never really make mistakes They will tell humans what to do in a few years Esp with nano technology that makes computers grow and add to other computers
Do you really think that a robot can take wise decisions, chose between things, show emotions, become a man? It just has some intelligence because it's been programmed by humans, robots and computers in general do nothing more than three (or four if you like) jobs. Inputting-Outputting, Storing, Adding.
No matter how the technology evolves, there'll always be a man behind all of this. Maybe a man who would like to rule the world, definitely not the machines. The machines are to be the means, the tools.