Is it realistic?
If nano-bot theories do come true, it will affect the world considerably. Imagine self replicating robots at a molecular size that will have the ability to manipulate matter one atom at a time until an object is completed. If this is possible then almost anything could be created, such as computers, weapons, cars, buildings, the list is endless. As of now most people are not aware of nanotechnology but as it progresses and it is publicized more, people we be more aware of the possibilities.