I would never buy a dashcam with GPS, as the GPS data can damn you - if the Police check GPS history they can tell if you were speeding at any time previous to the accident, and although it may not be pertinent it casts doubt on your driving and could be used by police or a lawyer to discredit you if case came to court. The scene of the accident is not going to be in doubt, but I suppose if there was an incident recorded by your dashcam that did not directly involve you GPS may be a benefit, maybe not to you though.
We can already be tracked by our mobile phones, simply by the fact they are turned on not by the fact that 'location' is activated (as Google and everyone else keeps asking us to do - but mainly for their benefit).
In this world, data is worth money and the mining of data gives information that a lot of people are interested in and will pay good money for. Even the DVLA will happily sell our data to private carpark companies, the local authorities will sell information from voting registers to companies and so it goes.
As Applicationcen rightly says 'transport is on the edge of being removed from our ownership' - not because autonomous cars will be safer, but they will be easier to track (they have to be trackable to function) and road pricing is coming whether we like it or not, and autonomous vehicles are 'tracking by stealth', making people think that the technology is for their benefit when really the government and tech boys are rubbing their hands in expectation of all that lovely money coming to them.
In the future governments will know where everyone is 24/7 - I can see a time when newborn babies are fitted with a chip that will register their position, heart rate , body temperature (and even whether their thoughts are anti or pro government) etc. etc for the rest of their life. And all this will be sold as 'being for our own good and well-being'.