"A British designer Warren Goodland has noticed the difficulty that seniors often have in dialing phone numbers telephone. His solution: a system where photographs of the user’s regular contacts are placed in a special peripheral attached to the phone; touching either the photo or the holder dials the desired number" (Engadget, BBC). I wonder if this technology can be somehow fitted into outdoor posters (maybe near payphones? or Bluetooth-to-cellphone?) so that when you touch the picture, you get connected to the advertiser.