At least it’s new to me. The rental car I have… a 2008 Dodge Charger has a new style ignition key. You stick it in like a normal key and it sends an electronic signal to the car telling it he key matches the ignition and will allow the car to start.
My Harley has something similar. It has a fob that just stays in my pocket. The bike will start up and run as long as the fob is within eleven feet of the bike. I like this feature, but am a little concerned that it might start up when I’m at home and accidentally leave without the fob in my pocket. My understanding is that it’ll run until I shut the engine off. There is an emergency way to start it with out the fob, but when reading manual it seemed pretty complicated and involved entering the bike’s serial number into the radio keypad or something like that.
I know Cadillacs have a similar keyless ignition system.