I like the idea of distributed computation but I've not really understood a good use case for it. I know you can use smart contacts to make tokens and NFTs and

I like the idea of distributed computation but I've not really understood a good use case for it. I know you can use smart contacts to make tokens and NFTs and what not, but that all seems like saying a thing isn't useless because you can use it to make stuff that is useless. It's not much of a use. Do you have an example of something useful or valuable done with ethereum?