Content creators can sell their work anywhere and can access a global market. Creators rely on the infrastructure and distribution of the platforms they use. These are often subject to terms of use and geographical restrictions.
Creators can retain ownership rights over their own work, and claim resale royalties directly.

Use cases - ticketing, in-game items, real estate, digital artworks, domain names, in the future it is possible that your car or house is also a NFT that you can only open if you can prove the ownership rights.

ethereum.eth - ENS service to register & manage a NFT domain

And if you create an NFT:
You can easily prove you're the creator.
You determine the scarcity.
You can earn royalties every time it's sold.
You can sell it on any NFT market or peer-to-peer. You're not locked in to any platform and you don't need anyone to intermediate.

The creator of an NFT gets to decide the scarcity of their asset.

A NFT item in one game can be transferred to another that's built on top of ethereum. It's also possible to have NFT-backed loans and fractional ownership.
All Ethereum products share the same "backend". Put another way, all Ethereum products can easily understand each other – this makes NFTs portable across products. You can buy an NFT on one product and sell it on another easily. As a creator you can list your NFTs on multiple products at the same time – every product will have the most up-to-date ownership information.
A lot of mining uses renewable energy sources or untapped energy in remote locations.
Ethereum is currently going through a series of upgrades, known as Eth2, that will replace mining with staking. This will remove computing power as a security mechanism, and reduce Ethereum's carbon footprint by ~99.98%1. In this world, stakers commit funds instead of computing power to secure the network.