Suppose you have an idea for a startup company and you don't want to quit your job yet because you don't know if you could bring together the other talent and resources to pull it off. Wouldn't it be great if you could perform a "hypothetical" search that collects people who would, in theory, be willing to make themselves, or their money, available if you can pull together all of the other parts of your startup? That way no one has to take the first risky step until the company is fully formed in a virtual way. You and your team of conditional future employees can work out the business model details before anyone takes the first risky step. Think of it as Match.com for startups.
Don't some people (many?) people put up a site with a 'buy now' button and count the number of clicks and gather email addresses to validate their concept before spending time coding up the solution? Or post the idea to HN? It seems possible to do some of what's being described already.