Using technology to change human bodies is nothing new. (A person is already technologizing the body when going for a plastic surgery!) But in the future, perhaps more advanced technologies can be used in changing the human bodies. Science fiction writers and filmmakers use their imagination in suggesting what can be done to our body in the digital era.

Computer memory in human brains

In William Gibson's short story Johnny Mnemonic, a chip was buried into Johnny's head, so that Johnny can transport data for his clients. Using a chip to transport data is definitely more secure. Even Johnny himself can never tell what the data is. Only Ralfi has the password to decode them.

In the film version of Johnny Mnemonic, Johnny's device for memory is quite different. He plugs a wire into his head to upload data to his memory. We do not know what exactly is in his brain, but the brain is surely highly technologized. To the clients (Yakuza), Johnny just functions like a computer, or perhaps not even as good as overloading can cause data leakage and threaten the life of the data-carrier himself.

Despite the fact that scientists have discovered that our brains has greater potential than computers, men seem to depend more on computers in memory in this digital world. Perhaps one day we will all become Johnny, using chips to memorize things.
 

In the film Matrix, human beings are "grown" by computers. While we regard it as a norm for humans to produce computers, the Matrix produces humans like a factory produes goods! The Matrix have humans connected to tubes, so that they can have accurate control on their growth. Every human has sockets on the body for plugging in tubes, with the exception a minority of pure humans. Perhaps the director deliberately makes the scenes of "growing" humans very unpleasant --- gloomy environment, sticky liquids, tubes that looks like insect legs, etc. --- so as to express his view on how terrible such technology could be.