If the 'making up work later' example weren't exclusive to white collar workers who already have the flexibility to take their work home it might make sense, but i'm fairly certain that's a small percentage. The public sector, blue collar jobs, service jobs... these would be difficult to impossible to do remote, and on one's own time. We are the very lucky small minority who are not location- or shift-constrained.

The article is addressing millennials at large who all want to share the responsibilities of child-rearing and bread-winning. I think this is an incredibly difficult change to make for the majority of millennials and their employers - without screwing somebody over, that is. I'm pretty sure if it does get implemented it'll be at the expense of singles.