As I have big wrists and my eyes aren't getting better, I like a larger screen a lot. But for me, the most important update might be, that the screen now updates every second instead of every minute in the "inactive" mode. I do use the seconds display of any watch a lot when timing short things, especially when cooking. Whenever I want to watch the seconds, with my current watch I have to keep shaking my wrist to kee…
I think you’ll be pretty happy with the incremental energy efficiency gains.