Swedish businesses have started adopting 6-hour-workdays, and after reading about it, you'll want to clock out right away. The change is centered around the idea that it's better for employees to work shorter shifts where they can concentrate more intensely than it is to clock a full eights hours with multiple lapses in concentration.
A Toyota service center that adopted the policy has reported "happier staff, a lower turnover rate, and ease in enticing new employees," and according to an app developer in Stockholm:
I think the 8-hour work day is not as effective as one would think. To stay focused on a specific work task for 8 hours is a huge challenge. In order to cope, we mix in things and pauses to make the work day more endurable. At the same time, we are having it hard to manage our private life outside of work [...]. We want to spend more time with our families, we want to learn new things or exercise more. I wanted to see if there could be a way to mix these things [...] My impression now is that it is easier to focus more intensely on the work that needs to be done and you have the stamina to do it and still have energy left when leaving the office.