Beat Saber is a virtual reality rhythm game where players use lightsaber-like controllers to slash colored blocks that fly towards them in time with musical beats. It's known for being an engaging and physically active VR experience.
He showed us that and like what a workout with probably with BeatSaber.
""The speaker mentioned John Carmack being a huge fan of Beat Saber and how it provides a good workout, busting the myth that VR gaming is inactive."