Is this a market ripe for disruption - people are still buying a product that doesn't work? Also the market is likely to change over the next decade. What happens to car crime once a large number of vehicles are self drive?
If there isn't a police station in range, the car can skip the sleeping gas and deliver a two hour lecture on the evils of car crime - which would probably be more of a deterrent than jail time.
Of course, false alarms would be even more inconvenient than they are now.
That's a good way to get someone killed if the dosage wasn't monitored correctly