for (hopefully) a better explanation :
that said, doing this would open up at least one problem… say i was snapping between two points which aren’t an exact distance to coincide with my display precision… if we’re led to believe the tooltip dimension as completely accurate then something would have to happen in order to tell us the distance between these two points isn’t exactly what the tooltip is saying… so borrowing from sketchup, the tilde ~ could be used… or the tooltip would say ~43 1/4" as the distance between these two points.