https://www.cnet.com/news/two-player-lightsaber-duels-come-to-disneys-star-wars-ar-headset/

I faced off with a fellow CNET editor, lightsaber ready. His was ready, too. We stared at each other in our mirror-lensed headsets, and started swinging away. Multiplayer AR, kinda-sorta, has arrived.

Disney and Lenovo teamed up last year to make a Star Wars-themed AR headset toy, Star Wars Jedi Challenges, that uses a phone to project holograms to do battle with in augmented reality. The little Hololens-for-kids kit has had some software updates over the last few months, but it was a single-player experience until today's newest multiplayer update.