When I had younger children, and we had the nostalgic pull of WDW for them, plus the nostalgic pull of WDW from my wife's and my own childhood (mostly after the "tickets for everything" phase in the beginning), it seemed impossible to believe that any of the competing theme park experiences could ever catch up with WDW, in terms of guest attendance.
But these days, with the seeming reversion to the "tickets for everything" phase via making guests pay for things that used to be included and with the seeming unwillingness by Disney to do anything in WDW that doesn't promote one of the newer, less enduring IP's, Disney is squandering much of the nostalgic pull for both us and our 20-something daughters. For our daughters, Universal IP's hold as much nostalgia for them as anything Disney-related. Universal may be as money grubbing as WDW, but with WDW losing (or willingly shedding) its nostalgia advantage, it's a 50-50 shot whether our daughters decide to ditch WDW and go to Universal parks when they someday take their own kids to Florida for vacations. I think we're far from the only people our age who see the possibility coming that WDW someday loses its central Florida theme park king of the hill status.