I believe that we are only at the "tip of the iceberg" with this sort of technology- and related applications such as the iPad and similar devices. In my experience, well designed technologies and applications can open up a meaningful window to the world for children, teens, and others with disabilities.
Janet C. Read
University of Central Lancashire
Eindhoven University of Techology
University of Maryland
Walsh, G., Druin, A., Guha, ML, Foss, B., Golub, E., Hatley, L (2009) [PDF] Layered Elaboration: A New Technique for Co-Design with Children. ACM CHI 2009