From what I remember the solid ink to inkjet technology is very stable. From what I read the color reproduction on a iGen4 is very stable.
So, maybe it would be possible to sell the ColorCube as a remote proofing device that also copies, scans and prints locally. An RGB workflow is better anyway. As long as the images stay in RGB and the flat color is specified in PMS and all the profile information is in place, I would think it should work.
If it's not that hard to do, then the value of the box is the connection to the OPM/PSP. Being embedded in a network gets close to being a platform. In a user network economy, the platform is where you want to be. Remember Microsoft pre Cloud. Consider Google post Cloud.
The good news is that there would be a very natural connection between the PSP and the MPS based on the Color Cube. It's a printernet solution : Any one can print any where any time in any quantity.
Also since every creative department is always very late and very nervous about whether they made the file correctly, the stress relieved and time saved by having a remote proofer disguised as an MFP should be a monetizable value that has a very low cost of delivery.