Then there is the Mission to Mars, so you would start off blasting off into space and experiencing weightlessness, then reach mars and have some kind of adventure or experience. I'm thinking strong g-forces moving into some floaty weightlessness followed by anticipation/slight fear, some adrenaline rushes and mild alien psychedelics peaking into some pretty visuals (kinda like total recall without the majority of total recall).
Could even do a Mission to Venus where you start out the same and introduce sexual stimulation with mild alien psychedelics instead of fear and adrenaline... that could be interesting.
These kinda just popped into my head, but I'm thinking that simulations need to expand into experiences. Have the technology that is already being used, mixed and matched to create these adventures. All thats needed is a decent story line for the imagination and maybe cue points (music perhaps) in the audio to siginal the change in story. Perhaps even full screen images to get lost in while listening that change when the story line does. Kinda like H.R Geiger or Alex Grey imagery, images that cause you to focus and unfocus at the same time and create sensory overload.

just my thoughts.