In the queue, I truly feel out of this world, but when I notice the out of date lighting (who can't), hear the lift, see the track and supports, and witness not only the horrendous re-entry tunnel, the light leak that is the exit, but also the fact that I'm still in space, yet I can see the exit and where the other cars are going to load, not to mention the floor of the building itself, completely destroys any feeling that I was in space. And frankly, space should be smooth. It can be fast, and unpredictable, and it can throw you around in quick turns and drops, but it shouldn't be rough for no explicable reason. If they wanted it to be rough, they most likely would have had you weaving in and out of asteroids and avoiding fire from an enemy cruiser, but Space Mountain was always meant to be the "perfect" ride through space: fast, sharp, and smooth. BTMR gives the impression that it's rough, when in reality the track is as smooth as butter for the most part. They added roughness in. They didn't do that with SM. SM has become what it is today because of many, many years of neglect.
Also, as a side note on being able to submit to a fantasy and believe in the illusion, DL's SM had me from the moment I entered the inside queue, and it did something WDW's SM has never done in a while, it sucessfuly built up the tension from the moment I stepped into the ante-chamber before the loading room, and didn't let go until I saw my picture. I never knew a simple lift hill could derive so much joy, excitement, and adrenaline out of me, but it did, and you know what made it all the better? If you said the soundtrack, you'd be completely correct, and the fact that I always felt I was sailing through the cosmos didn't hurt either. And mind you, this was EVERY time I rode this attraction, no matter how tired I felt or what the time was, the moment I heard the first chord of the on-board audio, my heart was pumping, and I knew I was in for a hell of a ride.
I only wish that WDW will some day give me that sensory experience that DL did, but that will only happen when TDO pulls it's head out of a very dark place, and takes back their crown as complete resort destination.