Cat on a hot tin roof...
I had an Audi A4 demonstator about six years ago with elements built into the sunroof - kept the aircon on tickover, so really nothing new.
Wouldn't Toyota (and sister brand Lexus) do better trying to reduce the carbon footprint / air miles that the production of those batteries and drivetrains cause? Isn't this just another eco-con that allows a minority to feel good while making life for others worse? Look at the current arguements re bio-fuel taking vast swathes of arable land away from food production... or "low energy" light bulbs that take more energy to recycle at end of life than they ever save whilst lit.
Not for nothing is this car nicknamed the "Pious"!!