The part that excites me the most is the touch-screen panels inside each ride vehicle. The future in theme park attractions is interactivity that is engaging and makes you want to ride it over and over again.
Major kudos to Epcot and Siemens for putting new life into SSE by bolstering it's storytelling capablilties and not turning it into a roller coaster like some rumors suggested (i.e. SSE: Time Racers).
We rode that thing 3 times. GREAT time waster when you're tired.
Though I think it should have stayed communications, it seems to do that and more thus in some ways acting as a ride that justifies EPCOT's purpose.
I am a little concerned about the "make your own" future part because it wasn't too great in Horizons.
I will miss the old one. I kinda grew up with it!