> No you manipulate the market to want what you make. As an example consider 
> the electric light blub. Clearly people want to illuminate their 
> environment when it gets dark but they already had this ability before the 
> electric light bulb was invented. And simply inventing it didn't cause 
> people to switch to it. There was a whole infrastructure that had to be 
> developed and put in place. There was no market for light bulbs until the 
> market was created.
>
> Regards
> Sergio Masci
>   

Lightbulbs provided a significant improvement on what was available at 
the time.

A battery powered salt and pepper grinder would only provide a 
significant advantage to people who have a fairly major disability.
To everybody else its just a toy. My other halfs parents have one that 
has LED's on the bottom. I spose if its a "romantic dinner" you might 
have difficulty seeing how much of what your putting on your food, but 
then the whiring of the grinder and the LED light would take the edge 
off for me ;->
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