Read Sci-fi. There are many examples of this scenario played out. Iain M Banks ‘the culture’, Peter F Hamilton ‘void’ series, and while it’s been many years since Isaac Asimov’s ‘Robot’ series (written in the 1950’s, famous for the three laws of robotics) he also had some interesting glimpses at what society might become.
Universal income is probably decades away but is starting to be discussed now. We will still need to eat, need things, want experiences, need to fill in our time either productively or recreationally.