Jim, I doubt yer gonna need seat heaters out there. Maybe a vibrator function.
I contemplated adding seat heaters on my 911 when I had the leather replaced on the seats. The heater in the 911 is just fantastic, and when it is 16 degrees I have a warm car in a mile. I will always have on a big thick winter coat in COLD weather, and seat heaters just did not make sense to me for that car. Cooled seats like my wife's Macan would be nice, but a real challenge to engineer.
David, it is better to be sick at home and work than while on vacation.