Steve Jobs greatest feat was...

...selling technology to non-technologists.

Getting mp3 players into the hands of people who had no idea what an mp3 anything was. Turning the iPod into a device that your girlfriend wanted, even though you had spent ages trying to persuade her to get an mp3 player. "I don't want an mp3 player, I want an iPod".

And the iPhone, to be fair not a great phone when launched, but all if a sudden all the non-techies wanted one. No-one (except the geeks) was interested in email on their phone, then all of a sudden everyone wanted it.

Ultimately I think that his legacy will be turning technology into consumer electronics, the last great change before computers enter the ubiquitous phase, where they are routinely built into everything.

(cue post on the Internet of things, coming soon)