If GPS can calculate my driving speed (and it does on the N810, remarkably well) then surely Roger's point about more friendly directions is easily possible. If nothing else, referential directions would be more helpful. Combine that with movement speed (walking, driving, whatever) and you get something like "The empire state building is 14 blocks east, 5 blocks north from your present location. At current rate of movement you can be there in 30 minutes".