A key differentiator of Neuralink is that the implant can both read and write through ~1000 channels (each of which is a tiny wire into the brain). So it's not really the same thing as external devices that read electrical activity from outside the brain, because those cannot write data. Not sure if the initial implant supports much of this, obviously you'd start with the simplest use cases.
Which is why I will never get anything like that installed unless I'm paralyzed or effectively so. Humans have no mechanism for recognizing that a sensation, thought, or emotion, which arises within themselves, is actually inserted by malware. No thanks.
