Yes you have a 3d world, but now everything in it needs to be interact able. Knock your fist against a wall for example, it makes subtlety different noises ever

Yes you have a 3d world, but now everything in it needs to be interact able. Knock your fist against a wall for example, it makes subtlety different noises everytime - how do you program for that? Everything in the environment should have physics too. In a survival game if I pick up cello-tape and a gun and flashlight I'd expect to be able to attach it all together myself with my hands. All this stuff you can hide behind a button press on a gamepad+tv, but in VR it's so much more jarring when the world you are walking around can only be somewhat interacted with - the techniques we use to fake stuff today just don't stand up when you can look at them from a mm away. The idea of VR+gamepad just doesn't make sense to me - If I can't see/control my hands/feet as I'd expect then all these reports of VR induced sickness come as no surprise.