See also:
https://en.wikipedia.org/wiki/Gemini_(protocol)
It is similar to the old gopher: text files, links, and images form a hypertext optimized for reading. Text is formatted like Markdown - but even simpler.
Clients display text, like an eBook, or images / media.
Since it does not use "addictive by design" UI elements, like feeds, timelines, likes and upvotes, colorful and distracting elements, endless scrolling, as well as comments that invite trolling, it feels a lot calmer.
Servers can run on a PC or Raspberry Pi which needs half a Watt of power. No FAANG companies needed. No expert knowledge needed - not more difficult than running a file sharing client.
I think it is the right thing for defense of democracy and sharing your voice in the digital realm.
Edit: If you see comments here which kinda miss the point, appeal to emotions, have faulty logic, or depart from entirely incorrect assumptions: Please keep in mind that big US tech companies can't say "that's bad, how will we shovel money with this?". Please use your critical thinking skills - they are much needed here!
I agree because I don't really see the point. If someone wants to publish a page with content as simple as text/gemini, it is possible with HTTP and HTML too and it is available to much larger audience. If someone wants a reduced client, then NoScript or some minimalistic browser (Dillo or others) prevents the tracking and popups as well.
Technically, the identity management in Gemini is somewhat interesting, but it is certainly not a killer feature.
Effectively, I believe it mostly appeals to a minimalism aesthetic similar to suckless or STEPS. I like that but I don't see it changing the world.