"The new game employs HP's iPAQ handheld devices and location sensors to trigger the appropriate digital file, which includes voices, images, music and clues.
HP said that developing the new game has helped it to explore opportunities for new products and services that will emerge around the delivery of location and other context-based experiences."
Via the BCS.
I've always wanted to do something like a 'museum outside the walls' where hand-held devices or mobile phones deliver content based on your location. They could be used in walking tours, or signs could let people know that content is available. London has so many layers of history, and the Museum has so much content about London's histories.