Well for die Hard Star Wars fans, that dream may soon become a reality, or maybe not. The device is actually a plasma torch burning at 4000 degrees, and the fuel is carried on the would be Jedi's back. I do believe something like this would be far to dangerous for the mass market.
https://wegotthiscovered.com/movies/engineer-creates-real-retractable-star-wars-plasma-lightsaber/
https://wegotthiscovered.com/movies/engineer-creates-real-retractable-star-wars-plasma-lightsaber/