... A less obvious one is that, right now, in the United States and some other countries, any medical procedure intended to "augment" human capacity is considered medically unethical, and is forbidden by law.
For example, it is legal to make a retinal implant to help blind people see; it is against the law to give it capabilities that normal humans don't have, like the ability to see infrared or ultraviolet.
It is legal to give a deaf person a cochlear implant to help her hear; it is illegal to make a cochlear implant that would give her better hearing than a normal human, or to wire that cochlear implant with BlueTooth so that a deaf person can use a cell phone with it (the latter has actually been tried in the US).
Can you cite the law(s) and/or point to documentation prohibiting such 'augmented' medical devices? I haven't seen any such prohibitions in the literature.
