Until there is an interface for it that allows you to effectively touch type (or equivalent) then 99% of jobs won't be able to use it away from a desk anyway.

Until there is an interface for it that allows you to effectively touch type (or equivalent) then 99% of jobs won't be able to use it away from a desk anyway. Speech to text would be good enough for writing (non technical) documentation but probably not for things like filling spreadsheets or programming.