We can't all have that particular style of job, but we could move towards a work structure where 40 hours wasn't the gold standard of "full time". As we become ever more automated we could gradually ratchet that down. 4 days a week, or 6 hours a day. It's not like 40 hours was always the norm. Go back 100 years and people worked many more hours. I'm not sure why that downward trend stopped.