CelcomGPS

Lots of people have GPS devices, I even have one for my bicycle. It was rather expensive, but it is totally high-tech, it's one of the coolest things you've ever seen. Many people who do a lot of hiking, have personal GPS devices and they take it with them while they hike so they know how far they've gone, how far they have to go, their estimated time of arrival based on the speed they're walking, and therefore they never get lost. That makes sense right?
Sure it does, and park rangers love it, thus they don't have to go out and search for people or rescue them because they know where they are, they can find their own way back. Even people who go off the trail and bushwhack through the forest can eventually find a clearing where they can get the satellite and then know where they are. It keeps people from being lost and walking around in circles until they are so fatigued they just quit, and therefore have to be rescued.
Now then, recently our think tank was talking about all this, and the next generation of future of GPS devices. We all agreed that it would probably, in the future, be a brain chip which could be implanted, and one of our think tank members joked; "where is my GPS brain chip, I knew I was missing something, where the hell am I?"
We all laughed, but it's not too far-fetched considering Moore's Law and the speed of our technology, and how it is getting smaller and smaller. I mean come on already, they have GPS watches, personal devices, suction cup dashboard versions, and I can't even get the latest GPS Brain Chip? Why not, we have all the technology already.
Further, as we thought about this concept we decided that a small overlay could be attached to the lens of your eye, between the layers of the retina, and it could make itself visual whenever you wanted to use it, and it would put up a micro-screen and GPS display.