Are you sure that was Tomorrows World?
Going Live did that as well...
I remember that on Going Live. They basically foreshadowed SD cards.
I can remember them debunking the shampoo industry.
They took a woman with waist length hair, wrapped it up and let it sort itself out.
That wasn't Tomorrow's World, it was, eh, something else, I can't remember the name offhand. Same show did a project where they had people wear goggles that inverted their vision. After a few weeks they'd all adapted, then when the goggles were removed none of the subjects could walk in a straight line.