You are telling this as if "go build it" is the least important part.

No, it is the most important and hardest part. My point about it ever shipping or being as good as the promo video alludes to this. It's easy(ish) to create a slick landing page and quirky video demo, it's hard as hell to make a product.

This is what people usually use Kickstarter or Indiegogo for.

With the updated hardware rules (show a prototype, no photorealistic renderings), this isn't even kickstarter material.

https://www.kickstarter.com/rules/prototypes

Or Hackernews :-)