The list is so long. I miss...
Horizons (it was one of the few "future" elements left in Future World")
World of Motion (Disney Needs more animatronic, slow dark rides)
Tapestry of Nations and Main Street Electrical Parade - The 2 Best Disney Parades ever.
If You Had Wings - Brought to you by Eastren, the wings of man. Buzz is just not as good.
The House of Future Living - This was the original post show for Space Mountain which you watched from the speedramp. The space station thing they have now redfines the word DULL. Heres's to the future and you!
Mr Toad. - What were they thinking when they removed this?
The Skyride - This was not only a great ride, but saved a lot of walking.
The Original Tiki Room show - I know it was dated, but I loved it. At least
Disneyland still has it.
The original Tomorrowland Theming - I know it was dated, but it always look futuristic to me.
And Finally - There used to be a little shop by the Liberty tree run by Nestle. The sold cold milk and warm tollhouse cookies. Its been gone a lone time (more than 20 years), but I miss it everytime I go to Liberty Square.