Sir James Dyson will tell you, it's not eas being an innovator.

Dyson is the guy who, a few years ago, came up with a whole new kind of vacuum cleaner, which he dubbed the Dual Cyclone bagless vacuum.

It was a revolution in vacuum technology that upended that well-established undustry.

But as he told me, in our 2004 interview, it isn't as easy as just building the better mousetrap.