Weather predictions are not fiction. Some businesses pay millions for a specific weather forecast (one that could dramatically influence the profitability of a venture) in order to enable better planning. A good example of the importance of weather and climate forecasting would be the Climate Corp sale to Monsanto for ~$1B.
Predicting the future is really really hard. Over the last few decades we've made a lot of progress and we're about to get a lot better, too.
Or will it just be a matter of who will offer the cheapest service?