When I say simulation, I mean exactly that. If you've ever tried VR, it's pretty amazing and immersive. Head-tracking, immersive field of vision, real world scaling all aid to make whatever it is that you are watching as convincing as possible. I've only played around in the job interview section the most and there are many companies you can choose from and/or different fields all with unique questions to prepare oneself to speak in a public setting. Just check it out, it's worth it.