It's been several centuries and yet the brain is still a big mystery for the humanity. I don't think 2 decades would be enough. I'm not saying that I'm against cool technologies, but such a progress is hard to imagine being done so "soon".
Technological progress can follow an exponential curve. It doesn't have to. Which is why we're still using the same basic pacemakers that were invented in the 1950s. Nothing better has been invented for people who have the sort of heart conditions that require pacemakers.
I'm massively optimistic about the rate of tech development, I think we'll have some really world changing things in twenty years but I really cant see brain implanted AR being a thing for a long time
What is your benchmark for success? A brain chip that can augment reality? In my opinion the real potential for a brain chip is more of a technology to expand accessibility to people who can't control their bodies. Also in my opinion, no one should trust Elon Musk or anything he makes so Neural Link I don't think highly of. The potential to provide people with severe mobility challenges another means to interact with the world is something worth developing. That I can see happening in a decade or two. A general purpose brain chip, yeah a hundred years plus, if ever.
Under capitalism? I wouldn’t trust any sort of tech implant. I say that from the comfort of my full physical faculties, so maybe it’d be different if I couldn’t, but Jesus I cannot imagine being at the whim of any tech company.