True, but compared to the Satomobiles that level of tech shouldn't exist yet.
Well first, development and usage of technology is a contrivance to the degree that it makes the show interesting. That's why no one uses guns.
And second, any time you ha e an alternate world there is a different environment technological advances are made in. In a hypothetical world where people have the magic power to teleport, travel technology and every related development would be highly unnecessary. So it wouldn't be weird for them to have color televisions before automobiles. Additionally our own technological advances have come out not just from the nature of our world, but partly random chance, and so there is innate variance.