Very interesting topic,

You bring up a valid theory that a lot of jobs will be taken over by AI. Given our current rate of technological advancement, we very well may see some of this come into play in our near future!

Our saving grace when it comes to millions losing work may be that advancements in energy, genetics, and nanotechnology will make living less expensive and thus reduce the cost of survival.

Of course this is wishful thinking, and this assumes that the people who are in control have humanities best interests in mind, rather than greed and power.

Great post!