For a little bit of perspective, I would point out that many manufacturers are trying to utilize new technology and are waiting to see what we like. So many of the 'multi step' systems, unlock the door, place the key/device in the dash, push the button will die due to market dislike. The systems which will be adopted by many are the ones that are easy to use or transparent.
The ones that allow you to carry a card in your pocket, have the car unlock when you touch the door handle and start the car with a push of a button or twist of a switch will, I think, win out
Come to think of it, that sounds like how things were with the truck my Dad had in the late fifties. Just walk over, open the door, twist the key and go. You see we lived on a farm. The doors were never locked and the keys were in the ignition.
Simple.
Les