My first thought reading the article was why wouldn't I use my phone for this. It does make sense what Gavin said and having the cart magnet with it always on.
This would be really nice to dial in distances. Seem super easy to carry around and place. I didn't see it talk a ton about accuracy in the article. Have you seen any accuracy issues from 100 yards and in for distances with wedges?
I don't think any of that affects how you swing the club or play golf. Maybe the traction has a difference. But the human body can get used to stuff real fast.