Some theorists say this is the first step to achieving technological singularity. Once it becomes possible to replicate human mind/consciousness in computer mem

Some theorists say this is the first step to achieving technological singularity. Once it becomes possible to replicate human mind/consciousness in computer memory (by running a brain simulation), the line between man and machine will become very thin. What happens once you upload your consciousness into a computer? Are you creating a new instance of yourself? What happens once such creations are able to harness the power of underlying infrastructure and use high powered processors to perform calculations and do reasoning? I remember reading somewhere that humans might well become a completely digital species if this ever occurs. Interesting stuff to say the least...