I think that people tend to greatly underestimate how amazing (and also insane) virtual reality could be one day, once it achieves all of the following: (1) sufficient image and audio realism that (at least a lot of the time) your brain is fooled into thinking it is having a real-life experience (state of the art is progressing steadily in this direction). (2) massively multiplayer real-time environments (with fast internet and computers with state of the art GPUs, this is fairly doable a...