Henry Ford did not invent the car, but he applied to it the industrial practices (which he did invent) that put it in a position to change the world.
Actually most of the industrial practices came from other folks - Oldsmobile did the first assembly line for cars. The contribution of Ford was the automated conveyor belts to the assembly line. He also made it a point to adopt best practices from other companies to improve efficiency. He was an inventor - his inventions were improvements on certain automobile parts.
[quote]Steve Jobs did not invent the smartphone or the tablet but it's because of him that those are now household words and we're moving towards a world where everyone carries a personal Internet-enabled device at all times, and all the technological and social change that entails. That's already shaped 21st century society more than any other person in the technology (or fashion) industry has to date.[quote]
We were already moving to everyone having a internet enabled smartphone. Everyone had RAZRs or better phones before the iPhone. The big difference is that instead of smartphones with slide out keyboards, we have smartphones with touch interfaces. It is quite possible that touch enabled smart phones would have happened anyway - indeed one quite similar to the iPhone went to market around the same time as the iPhone (and the founder claimed that the idea might have been copied from them).
With Jobs making it fashionable the spread of capacative touch phones probably spread more quickly, but probably only by a year or so.