I can see where a few GOV agencies (US and abroad) would use that feature.It appears to me that there are two points here.
1. Infared/ Night Vision display Modification. Sort of interesting, but only available from a company that is modifying these and selling them on contract to the U. S. Government. The general public need not apply. I don't know how many people out there own and use night vision goggles,, but I would suspect that the number of those is exceedingly small.
If it has been engineered correctly, only a standard USB (mini on the radio end) cable should be needed. Also the audio could be carried over the USB port as well. Icom does this with the PSR1500/2500 series. All that would be needed is the proper drivers.While I don't know, I suspect that the "Slot Card" port will go away to provide space for the Micro SD card port, and the current multifunction serial port would be replaced by a USB connector or modified to provide USB functions probably needing yet another very expensive cable..