John,
Don't knock it until you've tried it! 
To those who know me well, I am a notorious late adopter of new technology. I held out for years before succumbing to an iPhone, and a primary reason for changing was the large buttons for dialing phone numbers. I try to keep my mind sharp by remembering phone numbers and addresses in my head, and by executing many simple calculations mentally.
I will never buy an electronic distance measuring device for golf, and I will never use a GolfBoard for transport. I don't even use an umbrella anymore. If it's raining, I'll put rain gloves on and get soaking wet. There's already enough "stuff" in golf.
While I am sure the GolfBoard leaves a less destructive trail than a golf cart, I am convinced its footprint is more intrusive than human footprints. If the course is damp, it will leave noticeable and unsightly tracks, which will be less attractive than footprints. I suppose the difference between a GolfBoard and a trolley is only modest.
To me, the GolfBoard is pretty offensive, a cool, expensive toy that reduces the physical effort of playing golf. All told, it is counterproductive to health, but may serve to keep more people playing golf. To me, it's a waste of lithium ion batteries that could be used for productive energy storage elsewhere.
Walking the golf course is sacred, the single most important aspect of playing golf. My father used to call golf the "career extender". He walked and (mostly) carried his bag around the hilly Stanford Golf Course until he died of cancer at age 75. I had a serious knee surgery when I was 28 years old, and it took my knee 15-20 years before it no longer swelled up after walking a hilly course. So I used a trolley for many years, and will still use a trolley if my knee gets sore, or while playing several rounds in a short period of time. But the walk is sacred, a fundamental part of the game, a game which requires a level of fitness, exercises the body and makes it stronger. Furthermore, I don't see how anyone can expect to properly evaluate golf courses without walking the course. You can evaluate the quality of shots that a course presents, but you cannot appreciate the true rhythm of the game.
At some real level, the golfer who uses a cart or GolfBoard is cheating. I'm sure they are fun to use, but for me, the GolfBoard is just counterproductive crap. You're supposed to walk the course.