How come? I think a single media player/manager/server makes for a compact system.
If it can send VIdeo out via HDMI to an AVR and audio out via i2S or SPDIF or USB to a DAC and then to a stereo amp it could serve both music and movie needs.
My understanding of this thread was that it was about dedicated audio streamers. It is of course good to have a digital output so that can be used when it is to be connected for instance to an AVR, but products like for instance the Auralic streamer mentioned in this thread is obviously marketed towards people with high end hifi systems, who are just as likely to connect it to a traditional stereo amplifier, thus needing a DAC in addition to the streamer. So it should have a DAC and analog outputs onboard. In the same way a CD transport without a dac makes little sense, so does a dedicated audio streaming device without a DAC make little sense (to me at least).
It's a product that tries to make money out of the fact that some people believe that an external, 5,000USD dac will improve the sound.
Streaming products that are in essence a pre-amplifier with streaming capabilities (having both analog and digital inputs and outputs) makes more sense to me, and are immensly more versatile than a pure streamer.