The Ford patent expired in 2011, so any manufacturer can use the technology termed Quickclear (Instaclear in North America). Apparently RR was the first to use it way back in the '60s. Very few USA Ford model have it, there doesn't seem much interest! Most EU Fords can be spec'd with it and are really common.
I had the heated screen in my Alhambra (built on the same production line as the Galaxy and Sharan) back early '90s, fantastic and have missed it ever since moving to Mercedes cars. Only the Special Protection Mercs could be optioned with Quickclear screen.
If it were optioned on the Lexus, I'd have it in a blink of the eye...
Vehicles That Use Heated Windscreen Technology
Ford Motor Company
Land/Range Rover
Jaguar
Volkswagen
Vauxhall
Aston Martin
Skoda
Mini
Nissan
SEAT