That is an excellent idea No_one and could be used world wide to enhance safety. Maybe send an email off to Garmin or some of the other big radio / transponder manufacturers (seriously). There's a few technical considerations to think about like multiple radios etc, but it certainly is a good idea to think tank.
I would except that I am fearful that what I hope would be a simple software upgrade would become a CASA mandated $20k hardware upgrade....