He is to the point where he can accomplish anything remotely in the realm of possibility. He has the resources, motivation, and surrounds himself with the right people to do so, and I think if he really wants to do something he will make it happen. As for merging the mind with AI, I believe we could have a working prototype of some sort of computer controlled at least partially by the brain within 10 years, and have more advanced merging like integrated smart control and embedded AI in 20-30, possibly sooner with advances in biotechnology and AI’s intelligence. However, getting it affordably to the masses and convincing people that AI won’t take control of their brains is a much larger issue than production and development itself. Most people are uncomfortable with Amazon putting smart cams in their homes, imagine how they will feel about AI that by as early as 2024 will reach singularity.
Also, don’t forget about Boring Company! They have a new $600 flamethrower coming out.