Like all such tech advances, there will be a mixed bag. Best to pick and choose the advantages while avoiding the bad parts. Well-curated YouTube videos versus digital heroin.
We already curate the people we hang out with, and to some extent the people we disagree with, but listen to.
If one day we can really really scan brains, how do we resist the temptation to eat them (figuratively) and become something ... more ...
Life will change with advanced BCI, but it's difficult to anticipate how.
I guess my bias is that I feel like my own personal mind-map or world lens is my own personal competitive advantage against the rest of the world and that's what I use to differentiate and make money. Taking that advantage away seems like a life-deranging experience as it defines who I am.
But that's how incumbents always feel when they get disrupted. I suppose victors always have defined themselves by their ability to adapt to change.