Neuroscientist, Inventor of Palm Pilot
Machines will understand the world using the same methods humans do; they will be creative. Some will be self-aware, they will communicate via language, and humans will recognize that machines have these qualities. Machines will not be like humans in all aspects, emotionally, physically. If you think dogs and other mammals are conscious, then you will probably think some machines are conscious. If you think consciousness is a purely human phenomenon, then you won't think machines are conscious.