This is a good idea, but maybe not a billion dollar idea. When was the last time you needed to find a product immediately, regardless of store (and had trouble doing it)? It couldn't be more than once or twice in the last week. It sounds like a novelty, not a necessity.

You are 100% prepared to pursue this idea. Build the best inventory software that you can and give it away for free. If what you make is easier to use than the current average solution, you'll be able to find someone to use it. You don't need anyone's permission or approval.