If we had 100% reliable brain to machine interfaces today, I don't think it would change much for the average person. It would be like having a voice assistant with 100% ASR accuracy. Yes, you would be able to use it silently and that would certainly be more convenient, but we have to build better bots/skills to handle that input. Maybe in 25 years we'll get there, and by then brain interfaces will be a natural evolution.
