Lloyd,
I see more and more golfers wearing the distance watches, which seem to reduce the time it takes to determine yardages.
But, I doubt they'll reduce the general pace of play.
One can only hope
If one looks for yardages on irrigation heads or uses a scope, he will save time with a GPS watch. However, this alone will not make much of an impact. A player who has to look at the target, shoot a distance, visualize the shot, and rehearse the swing several times will always play slower than the guy who looks, pulls the club, and hits the shot in rapid succession. For the latter, the watch can help.
Lloyd-
I am a fan of the GPS watch used in conjunction with a pin sheet, though I have not found one I am happy with. I bought an Expresso WR62 to replace the original version of the Garmin Approach. Garmin claimed 8 hours of battery life, but within the first three months of use, it was mostly depleted within four hours (it died after three on my last round before I sent it back).
The Expresso provides 12 hours of use on a full battery as advertised. Unfortunately, the recharge leads are exposed to the skin and clog up routinely. The fix is relatively simple, warm water and soap applied with a tooth brush, but I don't like the idea of putting water and electronics close together. I've had issues with holes not advancing automatically, a common problem supposedly solved by the company with a software change. Unfortunately, though I have a good computer with current software, the update sent via the internet doesn't work and they want me to send the watch in at my own cost. CAN NOT RECOMMEND EXPRESSO.
I am left to reconsider a range finder, shaky hands and all. The friend I referred to earlier that had a battery go out twice on his emailed me that it had only happened once (he hadn't gotten around to replacing it for awhile). It appears that changing the battery is very easy. On the GPS watches, at least the Expresso, once the battery dies and can't be recharged, you chuck the watch and get a new one. On the plus side, this should take a few years of moderate use.