I guess in countries where you're more likely to be driven around in the back of a 7, that type of option is more useful. Stateside I know the Jeep Grand Cherokee has it available as an option, as well as most of the higher end Mercedes.
2014 M6 Convertible Individual Citrin Black/Champagne Full Merino - 6MT, Carbon Ceramic Brakes, Exec, B&O, Night Vision, Driver Assist, 15% Tint, Coded
2013 750i Mineral White
2011 750i Jet Black
2007 750i Monaco Blue