Imagine trying to describe cars to pretty much anyone in 1870. You’d need to explain that hundreds of millions of people own these crazy futuristic contraptions. Each such contraption weighs about 3000 pounds, can go faster than 60 miles per hour, and can be controlled by anyone from a teenager to a senior citizen.
Also, to make this entire system work, much of our world will need to be radically transformed by an insanely expensive system of paved roads and highways. Just to make cars practical to use.
The person you are talking to would probably think you are crazy. And given what they know about reality, they’d probably be right to think so.
It is thoughts like this that allow me to believe in radical visions for our future. No matter how crazy an idea might seem in one era, it can end up being perfectly ordinary reality in a later era.
We don’t know what will be possible in the future. But we are always right to dream.