Some people have the notion that "if you build it they will come." And on the surface, we can see and point to examples of where this has happened - many internet communication vehicles start out this way - blogging, You Tube, etc.... Others too - Netflix, self-checkout at the grocery store, ATMs, hybrids, Kashi, etc...
But lets peel back the layer on the onion.
I think it is important that we identify WHY we want to build it - or our intentions, assumptions, and driving force. If the driving force is "that they will come," this could be a problem (meaning that this motivation may not serve you or others well).
If the driving force is the invention, the functionality, the passion for the work or product, then this has power. Ironically, this type of motivation is more likely to result in them.
Why do we really want what we want? What is our driving force?
The creators of the biggest breakthroughs generally don't start with a motivation to be big, known, famous, or rich. They lovingly tend to a project, cause, or company. This love combined with energy, focused action, and a wee bit of luck to makes something amazing happen. Sometimes slowly, gradual, them BAM - tipping point.
Sure, there are exceptions to this, but I think this is the way it happens most of the time. I would like to tip my hat to the people who are putting in the work - every day - that will make this world a better place tomorrow.
They don't build it SO they will come.