Yeah, I think the phone thing is a joke. Besides which, my standard leather phone case has wallet type pockets, so I could put a swisscard or similar in there if I wanted. Or just put a proper pocket tool in my pocket
This key concept is actually a nice idea, in as much as it utilises a piece of metal you'd be carrying anyway. Now it's not the right type of key to fit the lock on my door, and neither does it offer me a function I want, but as a concept I like it more than the phone thing.