The use of the computer should be unconscious - all attention should be given to the task at hand.
Boards serve as video screens, bulletin boards, whiteboards, flip charts, etc.
Gigabit WANs, MAN wireless, and ad-hoc wireless LANs will become commonplace. The obvious security and privacy issues must be resolved. Relevance Mobile computing represents a major paradigm shift, replete with new usage models and with technological and design difficulties to be conquered.