Our eight year old VW doesn't have it (except on a stand-alone sat nav), but our two year old car does where, I assume, it's part of the built in sat nav and camera system. I'm guessing its just increasingly a standard feature now; generally if one marque has something the others quickly follow. The most interesting bit, I think, is that since the reported speed is based on sat nav it's noticeable how much the standard speedo overreads. Obviously it would a bit, but I was surprised that on the flat at 100kmh its around 5%.
I hope you're enjoying your holiday in NZ.
PS in terms of things cars do they never used to, I had a brand new BMW hire car a few weeks ago and it flashed up a warning when it decided I was closing too rapidly on the car in front which was breaking more than I was. And I have a colleague whose car's dashboard shows an icon of a teacup when it thinks he should take a break based on the computer's "fatigue detection" of how he is steering.