TechnologyAdvantagesDisadvantagesExamples
Tablet PC
  • Provides both input and output of information
  • Intuitive for most users
  • Cumbersome
  • Reduces environmental attention
Wrist Mounted
  • Provides both input and output of information
  • Less difficult to carry than full-sized tablet
  • More difficult to see
  • More precise manipulation needed
  • Precision increases reduction of environmental attention
Virtual Retinal Display
  • Lightweight
  • Hands-free
  • Provides only output of information
  • Visibility sensitive to ambient light levels?
  • Fragile
Chorded Keyboard with Accelerometers
  • Single-hand input
  • Both text and motion input
  • Provides only input of information
  • Training required
Voice Command
  • Hands-free operation
  • Non-intutitive map operations
Accelorometer-Sensed Movement Commands
  • Greater digital freedom
  • Training required
  • Limited input commands