Would have to be measuring technology.
If the drivers hadn't gotten larger, the courses may not have had to follow suit (although the ball plays a role too) and the resulting difference may be negligible. Whereas measuring technology truly is new and has impacted play.
For lasers, I am an huge advocate of prism technology - all those guys trying to shoot a pin with shaky hands really slow down play. Point and shoot needs to be the way forward.
GPS is fine if you have a pin sheet.
Then again, our old pro tells us all we would shoot 3 strokes better if he pulled all the flags and we didn't worry about where they are. We should probably have a tourney like that during Men's league to try it π