IIRC Ford owned the patent for something to do with the heated front windscreen, hence for a long time they only appeared on Fords.
A good thing IMO as looking through one at night is like driving with a greasy window.
You must have pretty bad eyes then....
MINI has it too.
But I can't see the point really. Most modern cars can clear the screen using the vents.
I absolutely love having a heated front windscreen! It's much quicker to use the heated window + blowers than it is just using the blowers. And in winter, when there was a rather thick frost on it that would not budge when I tried wiping it with my hand, I just popped it on for a few minutes then popped the windscreen wipers on and off it all went.
I have no idea why more manufactures don't do this, but I wish they did!