The yardage books Mark Long makes in tour have more of the information players want than a laser can provide
The lasers however will help in situations far off line or when angles (for yardage purposes) are difficult to figure.
The accuracy of the books has IMO made the caddies lives a lot easier in practice rounds.
The amount of data, accuracy, and options for layups, tee shots etc allow a player to play a practice round with virtually all the i formation ready to go. It’s really amazing
While I understand many do not like this, as a player, I would gather all the same information in practice rounds and have it for tournament rounds anyway. These books allow players to focus on how to play shots and holes for management during the event.
[size=78%]I don’t believe the lasers should slow things anymore than it already (sadly) is. In fact, it could help in some situations when finding markers is difficult [/size]