With digital cameras, children and people are learning to express themselves in pictures and colors (or light). Television and YouTube really show the trend for audio-visual expressions. Maybe because audio-visual carries more information and reaches many sensory channels at the same time.
In comparison, text messages are getting shorter and more cryptic (and requiring deeper understanding of the context -circumstances- where/when the messages are generated).
The world are fast running out of time for people to sit down to read and to understand text in all possible contexts and intentions. More muli-dimensional/media expressions are here!