"“We’re fast approaching the day when people will expect accuracies of centimeters in real time out of their handheld devices and then we’ll see a lot of head scratching as things no longer line up,” Smith told Scientific American three years ago. It looks like that day has arrived"

Has that day really arrived?

I doubt, given the fact that most consumer navigation systems are reliable (directions on Google Maps, pick up on Uber and alike) as long as they are not being blocked by major hurdles.