and you better hope it's not in gear, either!!
I have seen these things...an electronic device
that allows you to start the car from inside the
house..it could be warm (or cool in summer) by
the time you get in it if you plan it right...

heater, a.c., etc. also the engine could be warmed
up and ready to drive...this could be especially
usefull in cold climates, eh, gnu?

maybe it is a safety deal so you must have the key
adn cannot run away with the car or hi-ja