That strikes me as disingenuous. Each PhD should make a mark on the field expanding upon the prior wealth of knowledge. That doesn't make each one suitable for a business opportunity, nor does the exact topic matter directly create a career (though the skills gained within the process should help greatly). I would recommend limiting your scope and talking towards particular examples and how the tools you may build could help those particular instances of PhDs.
> and will throw some tests up against the wall in the coming months, hoping something sticks.
I'm confused then. Why are you posting about a particular project and a particular website if you're not going to post anything concrete for months? If you want to test the waters with a concept, you need to present it in enough detail that the pros and cons of a particular idea can be weighed.