Handheld GPS
Not everyone wants a watch. Some golfers want their GPS in their hand — big numbers, no subscription, no setup. You pull it out, it knows what course you're on, and it tells you the distance. That's the whole story.
Handheld GPS devices have been around long enough to get very good at the basics. Front, center, back. Hazard distances. Hole layouts on a screen you can actually read in full sunlight without tilting it at an angle. Bushnell's Phantom 3 does this at a price that makes sense. Shot Scope's H4 and H50 add performance tracking for golfers who want more out of their data than just yardages.
Simple tools that do what they say. Exactly what the game needs more of.