Back to answer the question at hand:
I believe it is a geek thing.
The Hunting and fishing lend them selves to the GPS technology. I first started to use a GPS in my drift boat so that I would not pass a hole in the dark. However it is great for finding that great little place you found last year that was packed with Partridge.
Happy hunting (Pun intended)
My Son summed it up Best. More Treasure Daddy Find More!