The barriers to entry into implant technology markets includes the problem with our laws that prohibit the testing of medical technology on persons that are not physically disabled, or in other words the technologies must improve their mobility – or otherwise greatly improve their ability to function in day-to-day life. Implants for improving intellect are not warranted.
There will be problems with inadequacies identified when some people have them and other people do not. For an example, the people with them will excel at nearly every activity – when they are up to the level of motor control, while the people without them will not be able to compete on that level.
They will be banned from sports, such as the Olympics.
They may be banned from industries.