Can't see any point in such DVS to be honest.
Why would anyone use a system which can't be used anywhere else than in your bedroom where you are in reach of your shiny 900 or 850 mixer?? - not every club and bar does have a DJM. In fact finding a usb equipped DJM on a small venues is more than rare..
Not use for not mobile DVS solution and if there are no plans for opening it to asio soundcards which can be taken with you, Pioneer should focus their resources on something more usable than a "athomeonlydvs".