The 8-hour workday was an innovative idea at its start. Back in the boom of the Industrial Revolution, workers could be expected to put in 10-16 hours a day (and that was a minimum). Soon, Henry Ford came along with his own theories about the American workplace, arriving at a theory to shorten the workday to eight hours a day and 40 hours a week. This completely changed the game during the early 1900s, giving workers more time for leisure and time spent outside the office. The problem now is, this is the last time we've really innovated on this construct.