That's good. Here in the USA they're steadily gaining ground as well, especially since the Russian meteor event.
I think that out of all 50 states here in the US, we in California have the most dash cams at the moment. I was a passenger in an hour-long drive today through L.A., and I decided to look and see how many other drivers around here have dash cams, if any at all (via looking through their car windows as we or they passed). I spotted at least three definite dash cams - two SUV's and a Mustang had them. I was careful not to mix them up with GPS units, which look completely different anyway. I believe a couple of semi's I saw might have had dash cams as well, although I couldn't tell for sure. They are becoming more common here, and I have found over 30 accidents caught on dash cam here in California on YouTube over the last year.
Interestingly enough, a sideswipe did happen right in front of us today in Inglewood. A black SUV suddenly swerved into a Prius that was waiting to turn left at an intersection, taking off their mirror. Both vehicles then pulled off into a side street to exchange info. The driver of the car I was in did not have a dash cam though, unfortunately, but now he says he is getting one for sure. He has seen over a dozen accidents while driving around here over the last few years - one of them being fatal, right in front of him. A crooked cop also gave him (and two other drivers at the scene) a $700 ticket for passing a stopped school bus, even though the bus's lights weren't flashing, nor was its "STOP" sign out. He took it to court and the cop did not show up, so he got his money back thankfully, but he wants a dash cam in case of another incident such as this.