To cheer you up, in my experience over the existence of the App Store, anytime something like this comes to the Store is a big win for independent side projects.
Your project might possibly be way cheaper and solve a specific problem, so it would benefit from the awareness that Blender's large marketing footprint would inevitably leave behind ;)
Keep building!
I'm currently in contact with the Blender team to see where I could contribute, but you're right that there is space for multiple projects.
I think I'm going to focus more on CAD / architectural use cases, instead of attempting feature parity with Blender's main selling points (rendering, hard-surface modeling, sculpting).
