This really is an audacious proposal and will be an awesome tool if they pull it off. For now there is still a long way to go. There is no command for upgrading

This really is an audacious proposal and will be an awesome tool if they pull it off. For now there is still a long way to go. There is no command for upgrading a package version yet for example; in fact, when I looked at this a month ago, if you force it to install a newer package version without uninstalling the old one first, it simply seems to forget the old one ever existed and leaves associated files behind. Hopefully a lot of this will be ironed out by the time Windows 10 is released.