I can give you some Horizons perspective...ok here goes!
It was fantastic, you rode in a suspended vehicle a la Peter Pan but it had something under it unlike Peter.
It was narrated by a husband and wife who lived in the future and were kind of telling us about their lives and that of people close to them. I will always remember the part where they showed their daughter working in the orange groves and you could smell the oranges (whenever I get on Soarin' and smell thye oranges I lean over and whisper to my mom, "close your eyes for a moment and pretend you're on Horizons!!", and we both have a moment that results in a trickle of tear running down our cheeks.). And there was another part where they showed their grandchild learning about sea life from a classroom underwater (one of the little boys had his face up to the glass and was face to face with a seal!). Another part showed a family in space battling zero gravity trying to get the dog down from the ceiling. That's how the whole thing was. One part in the beginning had a man getting a hair cut and such from a robot whilst another robot was vacuuming the floor (this one is on display in the exhibit by the character connection that celebrates EPCOT's 25th).
At then end you could choose your ending by going through the desert, the ocean, or space. I remember always fighting with my niece about which we would take.
I was still fairly young when Horizons closed (I'm only 20 now) but I can still see it clear as day.
And I know how you feel about the old Figment ride. I cry at the end of the new one because it captures the essence of the first edition, as I call it. My dad bought me a DVD of the ride during the first edition and I love to watch it and pretend I'm 5 again. OH! And the white part was my favorite too!! I loved how Figment was going to use a rainbow to paint with and did, and I always wanted to ride on the merry-go-round that was in that room.
If you need any other kind of perspective, like, say, Wonders of Life or World of Motion perspective, I'm you're go to girl!
Can't wait to hear more!!