I also think it depends on what you mean by, "better." Are these new scanners better at deterring threats than a series of metal detectors and employees going through your bags? If yes, how much better? And are there tradeoffs for using that kind of technology?
I've spent plenty of time frustrated by slow-moving security queues at Disneyland, so I get it. But I also think the whole act of screening every guest that goes to a theme park total nonsense anyway, so I'm not exactly itching for them to spend more money on (potentially) more invasive ways to scan me in the name of safety ... especially because I don't really believe these things keep anyone safe.