But without a sign saying that you're in Tomorrowland, how did people know where they were? Oh wait, the attractions were actually futuristic back then...
Well, let's look at that a little closer.... Let's see:
Carousel of Progress..... Still there, but never was fully futuristic, mostly historical. Now completely historical.
American Journeys.... 360 movie of current scenes, After the entrance was changed we got Timekeeper and now Monsters. Timekeeper went backwards in time to current. For all we know even Monsters might be in the future.
If You Had Wings.... Past and present Airline history and travel promotion followed by Delta Dreamflight basically the same as Wings. Now it's Buzz Lightyear, which has much more futuristic feel then the originals.
Mission to Mars.... OK, futuristic, but so cheesy that it makes Stitch seem like a production of the movie Cleopatra. Alien really had the same story line as Stitch except scarier.
Grand Prix Raceway... What it is today... it was then.
Star Jets.... Same as it was then only updated with new rockets and background.
People Mover... Exactly the same ride with changed or deleted show scenes. Basically no massive change.
Space Mountain.... Still there, still basically the same.
The point is that the original Tomorrowland was not more the future then today's. In some ways less.