1- That was
somebody's idea.
2- That used to be the case.
That used to be the idea about Tomorrowland, too.
(Which WAS Walt's vision.)
But, practical realities intervened at
Disneyland, too.
Such as corporations concerns about revealing proprietary research secrets
and the lack of entertainment value in most REAL-world "things to come"
(which looked more like "plastic car
parts" than "flying cars.")
Nowadays, it gets even less exciting to talk about realistic future products,
as we are much more focused on "personal" innovations.
"Hey, look Edna, in the future they're gonna make a smaller iPhone and a larger iPad!!"
Someone mentioned NASA.
What's NASA?
(And, I mean that in the sense that NASA today, sadly, is not the NASA we once knew.)
Even in the 1980's nearly all of FW attractions featured a shot of the
Space Shuttle as it was THE principle example of
"the future" that we could all recognize.
But now, the shuttles are all grounded, along with most hopes
of practical (meaning "affordable" AND "useful") trips into space.
Who actually expects that we'll send a shuttle to Mars in the foreseeable future?
Our fiscal budgets can't even afford to maintain something as mundane as urban mass transit in most major cities. (Except, for the exceptions we can count using only one hand's fingers.)
Solar power? Wind power?
Bankruptcy anyone?
(I'm even depressing myself!)
And really, it's no secret that Walt had no vision for EPCOT to be built as the Epcot we know.