There is always room for more tools. The video doesn't really show much other than some procedural generation results with some topo lines. I think from an artistic point of view a procedural surface generator has value. Especially if it has World Machine type features. Not sure how nice SketchUp would play with your tool. To get high resolution detail in a terrain mesh may bottleneck SketchUp. Can your tool run Runoff/Flow Paths on existing real world terrain imports? If it does and it can preserve material UVs on meshes you would have a very useful tool. So someone in the Landscape Evolution space could run some type of preliminary simulation to show wind/rain/water erosion over time. Regardless, it costs you nothing to put your body of work out into ecosystem and see how it goes. Feedback is the best judge and it looks like you already have viable tool.