My Daughter's school asked me to teach a topographic map and compass reading class last year. After my intro to the map and compass, one precocious young lady asked me why they should learn such an outdated skill when we have GPS now. I fished around in my bag and pulled out a GPS unit I had brought with me. I called her to the front and asked her to turn it on and tell me what she saw. Her reply, after a couple of minutes, was, "I don't see anything, it's not working." I replied, "Exactly, the batteries are dead." (lucky for me and my object lesson, that I had neglected to change the batteries prior to the class).
To me is the essence of what we are losing, with all of our advanced tech, is our independence. It's easy to become dependent on the gadgets because they work so well. The down side is the gadgets are more vulnerable to failure IMHO. If you don't have the older skills (ie: land navigation) to back it up, you can find yourself in a spot.
Tom