One day offices will be a thing of the past 13 years ago
Empowering employees with choice is always a good thing as long as results are prioritized above their choices. My policy has always been to present company goals to our staff like so: Get X done, by Y, and be sure it meets our standard of quality. I don't care if you work in your childhood tree house up until Y as long as I am able to contact you if needed & you produce the desired results.
Marissa Meyer likely saw that the freedom wasn't producing the results she would like & decided to reel it in. I'm sure it will return when appropriate.
The wave of the future will be MORE offices that make people not want to leave.