3. A Maglev train system

Walt's dream that monorails would be adopted by transport authorities all over the world never really came to pass. But monorails were installed at both Disneyland and Walt Disney World, and are still in operation today. Given the concept that EPCOT (and Disney World by extension) would constantly evolve, would Walt have considered replacing the monorail with a more modern transport system? It certainly seems plausible.

And if he had, an obvious candidate technology would have been Maglev trains, which use magnetic levitation to propel vehicles with magnets rather than wheels, axles and bearings. Despites decades of research and development, these high-speed systems have not yet achieved widespread adoption. Two commerical systems are in operation (in China and Japan), with two further systems under construction (in China and South Korea).

A Maglev system was almost built in Florida during the 1980s. During the development of Universal Studios Florida and Disney-MGM Studios (at the height of the Disney-Universal rivalry), a proposal was put forward to build a Maglev link directly from Orlando International Airport to Walt Disney World.

The Florida Senate’s Transportation Committee approved the plan, but Universal's then-owner MCA was furious, believing that tourists would be whisked straight from the airport to Disney's property, bypassing competing attractions and negating the need to rent a car.

Disney was happy to support the Maglev proposal, but steadfastly refused to back slower rail links from the Walt Disney World terminal to Universal and SeaWorld. The best it would allow was a bus service. In the end, the Maglev project was dropped.

2. Tesla's Electrotopia

Autopia opened with the rest of Disneyland in July 1955. It allowed young riders to board real, gasoline-fueled cars and take them for a controlled spin around a "highway". It successfully predicted a future in which America would be criss-crossed by multi-lane, limited access highways - before President Eisenhower signed the Interstate Highway legislation.

These days, the Autopia cars at Disneyland are still refuelled with gasoline every single night. But, increasingly, auto manufacturers are looking towards future methods of powering their vehicles, including natural gas and electricity.

Given Walt Disney's love of attracting sponsors to help fund new attractions and give them a sense of authenticity, could he have teamed up with Elon Musk's Tesla to show off the company's electric car technology in an updated Electrotopia? It seems within the bounds of possibility.

1. The Home of the Future, Mark II

The homes of the residents of EPCOT were to be designed to enable appliances to be easily swapped in and out as new technologies emerged. And one of Tomorrowland's earliest attractions at Disneyland, from 1957 to 1967, was the Monsanto House of the Future (shown above). Walt Disney clearly had an interest in what our future homes would look like.

The Home of the Future got a reboot with Disneyland's Innoventions Dream Home in 2008. It's a fun detour during a long day at the park, but nowhere near as exciting as a microwave would have been in 1957. Would Walt have taken things a step further?

As it has in the past, it's likely that Disney would team up with a sponsor to build a new version of the Home of the Future. Maybe that company could be Qualcomm, which showed off its vision of the Connected Home of the future at the 2014 Mobile World Congress in Barcelona. This features a host of intelligent devices, including an intelligent wine cooler and a "smart" teddy bear, all linked together and controllable via a smartphone app.

Perhaps the most intriguing element is the teddy bear. This can be programmed to speak to children to wake them up, and say "goodnight" when it's time to go bed. This could surely be adapted to become a "Smart Mickey"!

What do you think Walt would build?

What types of rides and attractions do you think Walt Disney would build if he was still around today? Let us know in the comments section below!