If they were embracing Python, they would replace PowerShell with Python. :)
PS is built in, Python isn't, so Python can't be used to 'bootstrap' anything from the ground up in Windows. If you're going to have to bootstrap in PS, why not just stick with it?
That said, yes, Python is a portable skill.
And to say 'windows is going away' is hilarious - maybe in the Valley, but def. not in big orgs.