https://worldcoin.org/cofounder-letter
There are a few words about economic opportunity but little explanation, so you can discount that part. They don't seem to believe it beyond UBI distribution, which has the same problems as any distribution today[1]
Their main sell:
> scale a reliable solution for distinguishing humans from AI online while preserving privacy
> Worldcoin consists of a privacy-preserving digital identity (World ID)
> You can now download World App... After visiting an Orb ... you will receive a World ID. This lets you prove you are a real and unique person online while remaining completely private.
This seems to be the sole feature but "distinguish" and "privacy" are fundamentally at odds. Always! If you can identify a person, in any way, they are no longer private. They may be private for a little while, but as soon as User12345 is outed to be Taylor Swift, there's no going back. There's no worldcoin re-roll. Twitter accounts are more anonymous than that - at least if your anon twitter account is unveiled, you can make a new one! In that way uniqueness is anti-privacy. It has to be.
[1] For example worldcoin has a plan to confirm that people exist. It does not have a plan to confirm that people are dead. https://japantoday.com/category/crime/man-says-he-kept-paren...