Just a thought...
I know airbus have produced a runway over-run protection system (ROPS) that compares the aircraft speed and trajectory with that needed to gaurantee a safe stop on the runway.
What about something similar that checks whether your approach is stabilised or not, and warns you to "go around" if not? On modern aircraft with ILS, GPS, ADIRS (or similar), FMS and a runway database it would be possible to generate an algorithm that would do this. After all, many aircraft already have TCAS, GPWS and ROPS, all algorithm based warning systems that are in use and saving lives.