If you want to get a good understanding of this whole thing read the following:

"Sapiens", "Home Deus" by Yuval Noah Harari

"Life 3.0" by Max Tegmark

'Human Compatible" by Stuart Russell

"Superintelligence" by Nick Bostrom

"A thousand brains" by Jeff Hawkins, Richard Dawkins

And of course on this subreddit you must at least glance at "Singularity is near" by Ray Kurzwail

There's a bunch of optimists, pessimists and everything in between mixed in here for a good balanced perspective.

All of these are insanely smart people and deserve every bit of attention to what they are saying.

You can also get a short version of all of the above by reading Tim Urban blogpost on waitbutwhy dot com called "super intelligence"