I won't argue that nobody will use it incorrectly. In fact, I'm positive that it'll happen just like you say at first.
And then the internet will be flooded with bloggers talking about how everyone is doing it wrong since they're now self-proclaimed experts, repeating the same things they've heard someone else say.
And eventually, most people will get on the right track with it. It'll be a "GPS watch" in their head that's far more effective.
And I'm sure people will take it beyond that in ways that neither of us are prepared to imagine yet.