I'm really struggling to see why you'd want to install this in your body rather than just having it on your person. Is vibration really enhanced by implanting it?
Also, this won't be you "closer to nature" because humans are not naturally attuned to physically know when we are facing north.
Perhaps more importantly, how annoying would this be if every time you rolled over at night, you faced true north and got a nice vibration to wake you up.
I think it's more of a convenience thing, to be honest.
We're not attuned to be able to see where we're going via sonar, sense magnetic fields, etc. On the other hand, we're great at learning, and at adapting to when a sense is lost or added.
And the vibration really won't be that significant, it only has to be enough to get some feedback from it.
Also, this won't be you "closer to nature" because humans are not naturally attuned to physically know when we are facing north.
Perhaps more importantly, how annoying would this be if every time you rolled over at night, you faced true north and got a nice vibration to wake you up.