Well lets look at some possibilities...
Lets assume we do go back to a one wage earner per family.
Lets say our work week is 20 hours, over 4 days.
Let say because of technology, food is cheaper, as well as products, and energy.
The money used/circulating, for those things are now free to go elsewhere.
Perhaps travel, will become a big and affordable option for a lot.
That will require lots of infrastructure/support jobs.
I am sure lots of others could be thought up.
Now lets look at housing, in those childless years/retirement, etc.
Why do we need all that space?
I think it will become the norm to move into a something like a planned city, communal type, where energy saving can be a big win.
Think of a GIANT mall, with housing, medical, stores, entertainment, food/eating, etc.
All without the need of a car....
Sorta like New York city without the crime

A real self contained, and supporting, enterprise that frees up all sorts money and time.
The hard part is to think outside of our comfort, or what we already know, zone.
I think cash will be gone, and I think financial crimes will be a thing of the past, as the money system will be all computerized with 100% accountability, like trying to use your credit card on line now, only thousands of times bigger and better.
Can you imagine going to the doctor.
You are having some medical problems.
They scan you, like a CT scanner, only way smaller, etc.
It reads your complete body functions instantly, analyzing it on the spot.
Say if you need a procedure to clear a blocker artery, or a pinched nerve...
They take you to a different machine, give you a sedative, arrange you on a table, and then this machine does the surgery on you in minutes.
Because of science advancements, their is no recouping, or recovering, needed, you walk out on your own accord, fixed

I think they already have machines that perform sex.....
That is why Bot is no longer posting
edit: WTH, he just returned from the grave to post in front of my reply....
No matter, that is where he has been still stands!
However, I will be a rebel, living off the land on my island