Nice image, but never. The cost to design, manufacture and sell a car is so high that you'll not get a return on your investment for decades.
Apple would need to create a dealership network, train mechanics, salesmen. They would need to find someone to make the car for them or create new factories.
If you remember GM, they sold the Saturn line to Roger Penske (indy car racing fame) and he was trying to do just that except he already had the dealership chains in place. He contracted with another car maker (unnamed) but that fell through and the Saturn brand is no more.
Its a cool picture as I said but there's really no money to be made in this sector.