Even if the technology is possible and useful, I personally don’t think we will ever see brain implants used outside of medical applications. The surgery to install a brain implant is dangerous and expensive. There are also religious and social stigmas to overcome where brain implants are seen as something dystopian. Or what about the hipacratic oath of do no harm? It’s hard to justify the convenience of implanted computers when the potential side effects include death. IMHO Brain implants will stay in the realm of science fiction along with flying cars.