For me, the usecase, which TK. has pointed out (thanks!), would be to connect all MIDI hardware legacy synths to MIDIboxes (e.g. the SEQ V4) equipped with RTP-MIDI boards. Then, they are usable on all machines on the network, which would be a big benefit, as my small screen laptop next to the synths is not very well usable for arrangement work, but works fine for basic midi track recording/idea gathering.
On the bigger machine, I´d have all the screen real estate necessary to do some fine DAW work, not that I work this way as of yet, but it is a nice option. Also, there is very stable MIDI timing, which may be even better than USB based MIDI timing, as far as I´ve understood (depends on your OS).
Many greetings,
Peter