One of the major selling points for creating virtual reality experiences is emotional impact. VR has proven powerful in terms of affecting our feelings, for instance making us happy, curious, anxious, scared, or excited depending on intention. The last thing you want to do is inadvertently trigger people’s sentiments in unintended ways due to an oversight, or direct attention away from your main point, which is why affect must be thought into every step of the experience’s creation process.
Sometimes in order to understand how video games affect you, you have to look at the real world. Horror games in virtual reality appear to affect people a lot, and it may very well be connected to levels of immersion.