The writing is (literally) on the wall for text messaging.

From this story in the economist :

“New technologies allow text messages to be displayed on the sides of buildings, on public screens in cafés or on vast digital displays at sporting events and festivals. Such “digital graffiti” can be used in various ways: to capture the mood of a gathering, boost a brand, or to spark public dialogue”For more information check out Wiffiti (Wi-Fi Graffiti) or this article at the Chicagoist website.