Just like they explained in logic class in high school...a causation is always the result of a correlation, but a correlation does not necessarily mean that there is causation.
Not sure the GD snipet article on GPS from this month's magazine means anything. I would like to see this tested on someone else but professional golfers, 'everyday Joe's', as the popular saying these days goes.
I was linked up as a single with another golfer this past summer who had a GPS unit. He constantly felt the need to come up next to me and tell me, " you are X yards away" before each shot that I took. Irritating, but he quit once I turned around and asked him a question or two about his GPS unit. I think he just wanted to show it off, which is fine, I am a gadget guy with other things, so I felt his need to show it off.
I do see more and more of these creeping onto the course; barely a round or two goes by that I don't see someone who I am paired up with or on the adjacent hole either lasering or GPS ing a hole. And I play on a $20 a round muni.
I guess GPS and the like technology in golf are just like any other game or sport, you can use whatever level of technology is permitted within the rules, whatever you enjoy. You can still use a wooden framed tennis racket if you want, it is just heavier and more clumsy than a newer model. Same with wood v. aluminum bats, nostalgia vs. power and technology.
I choose not to use it, but that is just me. Not sure I can put a ball within 5-10 yards of a given GPS yardage point consistently, anyhow.