200 years ago people would have booed the industrial revolution. They shouldn't boo the amazing technology, but instead cheer for this liberation from toil and find ways to equitably distribute its benefits.
Why would you think that will happen? You seem aware of, for instance, the Industrial Revolution and what it has ultimately resulted in.
Come on, we're all adults and well-aware that if companies find a way to make people more productive, it just means they'll expect more, not that we'll get more free-time.
In most places with any sort of economic opportunity, I have a very hard time believing that part time earnings would get you housing on par with a full time earner in 1976.