Many advances in ICT etc come from trying to make things accessible to people with disabilities (e.g. text to speech).
20% of general Aust pop can't read text - dyslexia, vision, etc! Wow not including ESL.
Speech to text loved by students - get to facts, skim through. ESL peeps love it too, transcript to put with audio to help understanding. But issues: accountability and fears, be quoted, lose control of information they own.
Text to speech. iPad useable by the blind with awesome speech guiding the interface.
Learning best occurs when multi-modal contexts are enabled - not just a disability issue.