more use cases of mobile presence

some days ago i posted some mobile presence use cases. ‘boxes and arrows” today has more:

you’re about to call your friend, but when you highlight her name in your address book, you see that she’s driving in the city. since it’s just a social call, you decide to leave her a voicemail instead.

your phone rings while you’re in a crowded movie theater. you automatically know the call is urgent; otherwise, your phone would have automatically silenced itself.

you’re wandering through the paul klee exhibit at the MOMA, enjoying the audio tour—and enjoying the fact that you didn’t need to borrow a special audio player; a hidden transmitter next to each painting delivers the content to your phone.

you’re out and about, and your phone beeps to tell you there’s an open house nearby that meets the requirements you specified through an online real estate service. you don’t have time to tour the house, but you do have time to drive by. you stop in front of the for sale sign, which contains a transmitter that delivers detailed information about the house to your phone.