Weather forecasts are a more optimal way of knowing the future than looking at the sky. These incremental improvements might not mean much by themselves, but in aggregate, they've meant the human race has come very far.
Weather forecasts are great, and a huge improvement. But another weather forecast reading app isn't such a big improvement, unless they're easier, more beautiful or have better forecasts. I think the first two points are pretty much covered (there is always room for improvement, but still). My point is that we should aim to improve on the third point.