TRON's location makes me worry about the future of Space Mountain. I can see Space Mountain's guest scores dropping like a rock when people view it as outdated and hokey in comparison.
The way Disney surveys you're never really asked to compare similar attractions, with perhaps the exception of Fantasyland because there are so many they are unavoidably grouped together. You're supposed to judge each alone, but when they are grouped in a land basic human psychology starts to rank them. If A if "Good" and B was better than A to me, then I should rank B higher, but if "Good" is the best rating, then A should be "Bad" now.
In theory an update for Space Mountain to make it more modern would be nice... but we all know the most likely result is the ride getting torn down.