Mania for now but long term it will bring scarcity to the digital realm something that's important to fully develop the digital economy. Right now digital has been very profitable for a relatively few since it takes lots of money to develop a product but scarcity will let many more people make a living.
A simple example are artists. Artists have been mostly locked out of making a good living with their digital works but NFTs will fix that.
We will also start to see new forms of products that aren't profitable now since there is no way to cover the costs to develop them but with NFTs there is now a way to cover the costs.
I see the book market changing. Established authors will be able to sell their books and not have to go through publishing houses. They can sell them to the public and now the public will be able to resell the book and gain some of the money back and the original author can get some money too.
The future is very bright, as they say. There's finally a way to monetize cyberspace for the everyman.