Audi has that on A8, or they had, not sure if it's an option on the latest generation.
To be honest, I don't see why it's useless - Audi also used it for cooling while parked and A/C is off. The situations where it helps, parked car in the Sun in summer, is exactly when you'd have lots of sunshine. And having your car be 0-10C over ambient temp instead of 30-40C when you come back doesn't sound any less useful than say heated seats in the winter.
I'm thinking it's more about the price and perhaps extra weight than being useless.
That's a fair point. But for less than half the cost, you can just get a heat-rejecting ceramic tint put on all your windows instead, and not have problems like funny smells getting into your car (from the ventilation fan that pulls air in from the outside) or having limited performance on shady days or under trees or whatever.
I think it's a cool (har, har) idea, it's just a really expensive way to simply run a fan, without any actual air-conditioning associated with it, because all it's doing is circulating air, not actively cooling it. The same money could go towards something like a white leather interior & Huper Optik ceramic tint on the windshield, side windows, and rear windows.
I would be curious to see the results of a science experiment on all of this to get the actual data: feature cost vs. weight cost. vs. actual performance vs. other options like a light-colored interior, sunshade, ceramic tint all around, sunroof vs. no sunroof, and so on.