Originally Posted by Steve Jordan
My definition is here
Like so many other branches of SF, cyberpunk can be hard or soft. I tend to consider most of the "immersive VR" elements common to cyberpunk as soft, since the ability to "jack into" the human brain is still largely unproven and not understood (I think many people assume the human brain's inner workings are just a lucky code-breaking away from complete understanding, but I've always disagreed with that assessment).
These stories my interest you:
2001, Scientists place eel brain into small robot, brain is able to use light sensors and wheels to move around
2002, camera with implant for the blind
2008, thought controled games?
Once you can control the senses (input and output), you can "jack in".