I assume this is an automatic system, as a manually triggered one would have little advantage over the mobile phone that everyone already owns.
So where does this system set its threshold? I've had some serious accidents (serious as in lots of mangled metal), but when I've rung the cops all they wanted to know was that everyone was okay and that details were exchanged. They didn't even bother putting in an appearance.
So I can see the police being alerted to many many accidents they wouldn't normally bother with, and probably lots and lots of charges of undue care and attention being thrown at everyone for being silly enough to bump into each other. No such thing as an accident any more.
Actually, I can see every Sainsbury's and Tesco car park packed with automatically summoned emergency vehicles!
The more suspicious of you will already be thinking about this factory fitted GPS GSM system which is but a small data packet away from being a 24/7 vehicle tracker.