To be a real alternative to Windows 10 I would say any OS needs:
Seemless integration with Active Directory
Ability to be remotely managed easily:
Some kind of user restriction for permissions
(possibly) something equivalent to AD's roaming profiles
Easy management of remote drives and folders (both from a sys-admin and user perspective)
Seemless integration with groupware email/calendar services (e.g. Microsoft Exchange)
In all honesty, I haven't checked if Zorin has all these, if it does. Amazing. However, in my experience Linux (sadly) doesn't yet provide the same ease of use/manageability in a networked office environment that windows does.