What if we were able to route the usual outputs of our Rane cards to a USB mixer?

With new USB soundcard mixers like the DJM900, Xone DB4 or DJM2000 etc, it would be alot easier in a changeover situation if we could simply connect the mixer to the computer via USB, and route the outputs digitally.

The number of outputs woulds be determined by which Rane interface is connected, obviously.

Inputs for timecode should still be connected to the interface via RCA.

What do you guys think?