Erik, your correct at this point
The compelling advantage of a ZFS filesystem is it's shear capacity, along with data integrity; a highly fault tolerant 20-40TB system can be built using relatively inexpensive off the shelf SATA controllers and Drives. In addition, capacity expansion is quite straightforward.
ZFS also supports an enhanced set of ACL's similar to NTFS. In addition, ZFS natively supports snapshots; similar to Windows Volume Shadow Copy (also available across a network), or Apple's Time Machine.
I would be very suprised to not see these enhanced capabilities, eventually available via network shares (as is currently the case with Windows SMB and Active Directory). Time will tell..... the key here is that the host O/S will determine network capabilites, not the FS itself
http://download.oracle.com/docs/cd/E19253-01/819-5461/gbcik/index.html