No, it means that the Nexus features is available when a USB or SD card is inserted to a CDJ-2000MK1 and the Nexus and MK1 is connected via LAN.
The restricted features of CDJ-2000nexus are now available when a USB device or other media is connected only to CDJ-2000/CDJ-900 _
_while CDJ-2000nexus is connected to CDJ-2000/CDJ-900 via LAN cable.