Can anyone explain real web3 use cases?

So I have been looking into web 3 for quite a while and I get the feeling that I am missing something.

I get that its basically a decentralised web where:

• You own your data
• You get to authenticate everywhere with your wallet
• Users can get paid for ad revenue instead of companies like Google/Facebook
• Everything is transparent and secure

But here is my question

What real-life additional use cases does web3 offer that web2 just can't? I understand that the points that I mentioned are all great - but from a practical point of view what kind of functionality can you get out of web3 that you cant get out of web2?