Yes you are right it would become huge if bitcoin could be used in buying cars,automotive products.It would such a great opportunity for bitcoin holders to own luxury cars by using their bitcoins without converting it to fiat.This seems a very fastest way for payments that doesn't need to bring thousands or millions of money in purchasing cars.
Not just cars. It would really be very nice to see bitcoin being used generally in real life for payment purposes. Right now, the only thing we have in our hands is just a mere speculative asset and that is really not good, which is the main reason why we get to see the value of bitcoin fluctuating pretty huge and fast easily. As long as we can start having some real life usage as currency, I believe things would get better. This is obviously a good step and we would like to be seeing more from all phase of businesses across the world.