That's awesome that some companies are starting to be proactive about this.

One further step would be to require parents to take this time off. There was a news report about how American employees didn't use much of their vacation time last year. In a competitive company people who take vacation or the full parental leave can be seen as not being passionate enough about the job.

This can lead to an environment where nobody takes vacation and I imagine many will choose not to take parental leave.