Disney is a sleeping dragon. Once it wakes - it wakes all at once and we tend to get hit with "what just happened?!" I think for many people the construction of the New Fantasyland took forever, but for me, I kind of feel like I was just there six years ago and now so much will be added/changed.
Disney keeps an ever-watchful eye on its competition. But in my own opinion I think it's wasteful to keep opening new parks when the ones they already have receive so many negative reviews.
I see so many people saying "the parks are stale." And I have to imagine that those statements are made by people whom get to go to Disney far more often than I do. I've only been to Disney 4 times and there's so much that I have never done (we usually skip Tomorrowland completely) and so much that we never knew existed (like the raining umbrella at HS).