The world didn't have a chance against these alien invaders and when all seemed lost, it was the hand of God that stepped in and saved the world. The simple viruses and bacteria that we have become immune to were deadly to the marauding aliens.
Wells' work became the inspiration for many to come and was the foundation for the alien invasion story. If you look at today movies, they follow the same style as Wells. The blockbuster Independence Day was the exact same story, but you replace a physical virus for a computerized one. Perhaps it was the infamous Orson Welles radiocast that cemented its place in history. If you can make the public believe that the world is actually being invaded, then the story is pretty amazing.
There have been low and big budget movies based on the story and I am sure there are many more to come. War of the Worlds has become to science fiction what Romeo and Juliet has become to tragedies. Wells' look at the world and the fragility of our “supremacy” was sobering. It served as a reminder that just because we consider ourselves superior that could change at any moment.