I also saw your other article about keys. I think it is a solution looking for a problem for the apple watch. In general, I see a race where car manufacturers are choosing android or apple. I think that is the wrong approach to the car controlled or accessed by a device. If it stays, either apple or android, then the cheapest approach will win. There are less folks that can afford BMW/porsche and the like. Most people also have android devices. It will all come down to cost and what folks can afford. It would be better if the access to the car was device independent that way, any phone can control any car. Covers more bases.