Here's the closest thing to a real "Star Wars" lightsaber. At this year's South by Southwest Festival, Disney Parks and Experiences Chairman Josh D'Amaro showed off the next best thing. It's a lightsaber with a "blade" that actually expands and retracts, just like the ones in the movies. And it makes noises like them, too. Here's part of the presentation.
At the moment, Disney has no plans to sell them (dang it!). For now they're just being used by some of the actors at their parks and attractions.