It takes an awfully long to time to take on this type of project. It is not just like stringing wiring through the resort to get wifi.
To go wireless for security, you have to survey the buildings extensively to make sure there isn't one dead spot where a door could release accidently (security doors, with the exception of correctional facilities, "fail open"). Then you have to run massive amounts of wiring.
There's also no telling what order they are going to do the buildings in, how many they will tackle at once, what areas to do first. You have to realize the logistics of a project like this is overwhelming.
No doubt Disney leaves nothing to chance and they have a plan put together; everyone will just have to wait and see how they roll. Other than the ability to find a building permit for the work as the buildings progress, Disney releases information when they are ready.